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New and Important Insights Into IBS
      07/14/03 03:24 PM
HeatherAdministrator

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New and Important Insights Into IBS: From Epidemiology to Treatment

Nicholas J. Talley, MD, PhD

Introduction
Disorders of gastrointestinal dysfunction, including irritable bowel syndrome (IBS), continue to attract increasing attention as our understanding of them accelerates. At this year's meeting of the American College of Gastroenterology, a number of important new findings in IBS emerged regarding epidemiology, impact, diagnosis, prognosis, potential mechanisms, and treatment. This summary discusses this new knowledge and places it in appropriate clinical context.

Epidemiology
It is well known that IBS is highly prevalent in the general population, but national US data are limited and previous studies have often focused on self-reported diagnosis of IBS data rather than applying standard diagnostic criteria (eg, Rome).[1]

Hungin and colleagues[2] applied random-digit-dialing technology to conduct telephone interviews in more than 5000 subjects 18 years and older in the United States. Using a structured questionnaire to obtain information on IBS, they identified the overall prevalence of this disorder to be 14%, with a female-male ratio of approximately 2:1. More women than men had typical IBS symptoms, but overall only about one fourth had been formally diagnosed as having IBS; 34% had symptoms for more than 10 years, and 48% had symptoms for more than 5 years. Approximately 60% of subjects used over-the-counter medications, and 20% used nothing to treat their IBS. These investigators reported that abdominal pain was the major reason patients visited healthcare professionals. They also observed that there was a higher rate of cholecystectomy and hysterectomy among those with IBS in the population. These findings are consistent with other high-quality US epidemiologic studies.[3] Similar results have also been observed in Europe[4] and Australia.[5]

In another epidemiologic study of 1069 employees of the Veterans' Affairs Health Care System in Utah, Tuteja and colleagues[6] evaluated potential risk factors for IBS. They recruited a total of 723 subjects, obtaining a response rate of 72%, and observed that 9% had IBS, as expected. Adjusting for age and sex, IBS was not associated with smoking, aspirin use, alcohol consumption, or education level. However, unmarried patients and those taking acetaminophen were at a significantly higher risk for IBS. Being unmarried may be of relevance because there is a lack of social support and therefore a potential increased vulnerability to stress. On the other hand, acetaminophen use may reflect the need for this medication for abdominal pain or extraintestinal pain, although there is no evidence that acetaminophen effectively relieves pain in this condition.

Impairment of quality of life is considered by many to be an important prerequisite if a condition not associated with mortality is to be labeled a disease.[1,7] Hungin and associates[8] reported that despite substantial nonconsulting, IBS had a significant impact on patients' day-to-day life: 25% were working fewer hours and 20% had changed their work schedule because of the disease. Although IBS has a confirmed predominance among women, it is still not known whether there are sex-specific differences that predict health-related quality of life in IBS.[1] Sach and associates[9] evaluated this issue. They found that IBS in both women and men had a similar overall gastrointestinal symptom severity score. They also noted that IBS patients in this study had more impaired mental and physical quality of life and worse vital exhaustion scores than controls. It appeared that in women physical factors may predominately predict impaired quality of life, whereas in men cognitive factors appear to be stronger predictors of impaired quality of life.

Thus, sex differences do matter in IBS, as exemplified by the not-yet-explained superior efficacy of the new peripherally acting serotonin-modulating drugs in IBS, which appear to be more efficacious in women (although admittedly there are fewer data in men).[1,7] Additional work is required to interpret the sex-specific impact of IBS and explore the mechanisms underlying the sex-specific differences in this disease.

Diagnosis
Symptomatic Differentiation
There is increasing interest in evaluating the utility of symptoms for distinguishing IBS from other functional and organic diseases.[1] One of the major issues that often faces clinicians is the challenge of differentiating IBS with constipation from functional constipation due to slow colonic transit or pelvic floor dysfunction.

Crowell and colleagues[10] evaluated patients seen in a tertiary referral center who fulfilled the Rome I criteria for either IBS or functional constipation. They applied a standardized bowel symptom questionnaire to determine which symptoms might differentiate IBS from functional constipation. They observed significant symptom overlap for the 2 conditions. However, they were able, applying discriminate analysis, to correctly classify the majority of patients (73%), although the model appeared to lack clinical utility and requires prospective testing. At this stage, differentiating IBS from other functional bowel diseases based on symptoms is arbitrary; more work is needed to determine if meaningful groupings can be identified with more careful attention to specific symptoms and pathophysiologic abnormalities in constipated patients.

IBD and IBS: Common Link?
A key issue that continues to be controversial is whether IBS and inflammatory bowel disease (IBD) have a common link. A small increased risk of IBD among individuals with IBS has been identified in 1 prospective cohort study.[11] Furthermore, it is well recognized that typical IBS-like symptoms may occur in IBD in remission.[1] Therefore, it may be difficult to distinguish these diseases unless colonoscopy and biopsy are performed.

KothandaRaman and colleagues[12] evaluated the pain experienced by patients with IBS compared with that experienced by patients who had Crohn's disease. They studied 12 patients with IBS and 22 with Crohn's disease, all of whom completed the McGill Pain Questionnaire, the Pain Disability Index, the Pain Catastrophizing scale, the Multi-Dimensional Pain Inventory, and a quality-of-life measure (the 36-Item Short-Form Health Survey [SF-36]). Pain descriptors were similar in both groups, although the patients with Crohn's disease had a more helpless attitude and a lower overall quality of life. Therefore, it appears that the pain experience is similar in IBS and Crohn's disease and that using pain descriptors to differentiate IBS from IBD is unlikely to be effective.

Zaman and associates[13] evaluated symptoms in patients with Crohn's disease (n = 30) and left-sided ulcerative colitis (n = 25) or IBS (n = 21). In patients with IBS compared with active IBD, the symptoms were remarkably similar, suggesting that it can be difficult to differentiate IBD based on gastrointestinal symptoms alone. The precise utility of the Rome II criteria in IBD remains poorly defined, but these criteria are likely to be insufficient on their own. Alternatively, alarm symptoms, such as rectal bleeding or weight loss, in combination with typical IBS symptoms may be considerably more helpful in differentiating active IBD from IBS, as may be the use of inflammatory markers, such as a sensitive assay for C-reactive protein or calprotectins.[1]

Sugar Intolerance
Another condition that can be confused with IBS is sugar intolerance; however, the role of fructose and sorbitol in the etiology of symptoms typical of IBS remains controversial. A high prevalence of sugar malabsorption has been observed in patients with IBS, although the benefits of restricting intake of the problematic sugars has been highly variable.[14,15]

Gagliardi and colleagues[16] noted that the mean fructose intake in the United States is at least 37 g/d. They studied 15 healthy adult patients who consumed both 25 g and 50 g of fructose on separate days. Breath hydrogen testing was then conducted. The study authors observed that 50% of patients had hydrogen peak levels above 20 ppm with the 25-g dose of fructose, whereas 75% taking the 50-g dose had an abnormal hydrogen peak. This finding suggests that in the normal population a large number of individuals have fructose malabsorption. Furthermore, symptom scores were greater after both doses of fructose, although the higher dose did not increase the scores.

Choi and associates[17] specifically assessed fructose intolerance in the setting of IBS. They studied 209 patients with unexplained bloating, altered bowel habit, and pain who were given either a 25-g or 50-g fructose challenge. It was observed that in patients receiving the higher fructose load, symptom scores were higher for diarrhea but not for other gastrointestinal symptoms. Overall, one third of patients with suspected IBS in this tertiary referral center appeared to have fructose intolerance. However, avoidance of fructose and symptom relief were not evaluated. Clinicians may wisely wish to consider prescribing a low-fructose diet as part of their initial management of IBS with diarrhea, but the benefits even among patients with coexistent fructose intolerance are as yet not established.

Prognosis
Durability of Diagnosis
Traditionally, IBS is considered to be a "safe" diagnosis.[1] Adeniji and colleagues[18] studied a well-characterized cohort of patients to confirm the safety (durability) of a diagnosis of IBS. They reviewed a cohort of patients who were diagnosed with IBS between 1989 and 1992 and who fulfilled the Rome I criteria for the diagnosis. The study population was reinterviewed for IBS symptoms 10-13 years after the initial diagnosis. In 75 patients, the mean time to the second interview was 11.8 years, and none had the diagnosis refuted. There were other gastrointestinal diagnoses noted in small numbers among patients in this cohort, including 5 cases of diverticulitis and 3 of gallbladder disease. Many patients (46%) had undergone a second, but arguably unnecessary, structural evaluation that ultimately produced negative results (no change in diagnosis). Of particular interest was the finding that only 43% of patients continued to meet the Rome I criteria for IBS, implying that some symptoms in IBS will often fluctuate. This finding suggests that the current symptom criteria for IBS may require reconsideration to include subthreshold cases.

Postenteritis IBS
Currently, another area of major interest in IBS is the prognosis of postenteritis IBS.[19] It is now well recognized that up to 1 in 5 cases of IBS will occur after infection, and a low-grade inflammatory process has been documented in some of these cases, although histologically the colonic mucosa is normal.[1,19]

In a study by Spears and colleagues,[20] patients with acute infectious enteritis were administered standardized questionnaires 3 months after infection as part of a repeat evaluation. Although a small study, the investigators observed that 2 patients with IBS 3 months after infection also had depression. In contrast, the remaining 9 patients who did not develop postenteritis IBS were negative for depression on the patient health questionnaire. These results are consistent with the literature, which suggests that psychological factors may identify a vulnerability to the development of postinfectious IBS.[1] The latter may in turn reflect disturbed central down-regulation of visceral afferent signals from the gut that may be genetically determined.

Pathophysiology
Altered Serotonin Signaling?
The pathogenesis of IBS remains obscure, and in particular, an explanation for alternating diarrhea and constipation has been elusive. In arguably one of the most important papers presented during this year's meeting, Moses and colleagues[21] studied potential deregulation of the gut's serotonin transporter in IBS.

It is known that serotonin (5-hydroxytryptamine or 5HT) is released from enteroendocrine (or enterochromaffin) cells in response to either chemical or mechanical stimulation of the gut mucosa. Serotonin in turn initiates peristalsis, and then the serotonin released is taken up in health by a highly selective serotonin transporter (SERT). One potential mechanism that could explain altered bowel function in IBS is an abnormality in the serotonin transporter itself. The study authors evaluated this hypothesis in patients with IBS with constipation and IBS with diarrhea compared with patients with ulcerative colitis and healthy controls. They were able to convincing show on blinded review that SERT immunoreactivity was less intense in patients with IBS with constipation and patients with ulcerative colitis.

If these findings are indeed correct, they represent a landmark observation. The findings suggest that patients with constipation and IBS may have a reduced capacity to reuptake serotonin, leading to excess free serotonin and then desensitization of these receptors, thus reducing motor function. In contrast, in the setting of diarrhea, serotonin uptake was normal. If the underlying abnormality in serotonin transporter function alternated, then this would in turn explain alternating constipation and diarrhea.

These data strongly suggest that IBS is a "real" gut disease and a potential diagnostic disease marker. They also suggest that it is valid to subdivide IBS into constipation and diarrhea symptom subgroups. This study also provides additional rationale for the use of serotonin-modulating agents in IBS and provides a new target for drug modulation. Confirmation of these very exciting initial findings in larger patient samples is awaited with great interest.

Therapy
Tegaserod
Tegaserod is a partial serotonin type 4 agonist (at least in the guinea pig ileum) and is a prokinetic agent that also promotes fluid secretion.[7] Recent randomized, controlled trials have shown that this drug is effective in IBS with constipation, with significant global improvement and improvement in constipation symptoms and abdominal pain.[22] One issue to be resolved is whether the benefits of tegaserod are purely due to its prokinetic action relieving constipation. Animal data suggest that tegaserod has some visceral analgesic actions, although the relevance of this to humans is not yet established.[7]

Dunger-Baldauf and colleagues[23] aimed to evaluate the relevance of the improvement in constipation by performing a meta-analysis of the available tegaserod phase 3 clinical trials. They compared the time course of daily abdominal pain and discomfort and daily bowel movements and failed to show any temporal relationship between these symptoms. The study authors concluded that any benefit to abdominal pain was independent of the drug's prokinetic action. However, a proof-of-concept study comparing standard osmotic laxatives with tegaserod is warranted to validate this finding.

An important issue for clinicians is the safety of tegaserod. Ruegg and colleagues[24] evaluated the combination of antidepressant drugs with tegaserod in the phase 3 tegaserod clinical trials. They showed that tegaserod in combination with antidepressants appeared to be well tolerated and that there were no increased adverse events in this setting. This finding is reassuring because combination therapy is likely to be used by clinicians for IBS in difficult cases.

Tegaserod is a prokinetic, and hence diarrhea would be expected with its use. However, this appears not to be a major issue according to data reported by Earnest and associates.[25] The study authors found that when diarrhea was reported, it occurred early in treatment and that the majority of patients (71%) had only 1 episode. The safety of tegaserod, even in IBS with diarrhea, has been described elsewhere recently.[26] Therefore, although 1 in 10 patients will experience diarrhea, this appears to be a mild and transient issue that typically requires no additional therapy. There are 5-hydroxytryptamine type 4 or 5HT4 receptors on the atria in the heart, but other data support the safety of tegaserod in terms of an absence of electrocardiographic effects.[27]

Probiotics
Probiotics are gaining increasing attention as potential therapies for IBS.[28] Uncontrolled studies have been encouraging, as evidenced by presentations during this year's scientific sessions. Positive results were reported by Bazzocchi and coworkers[29] in an open, uncontrolled trial. Similarly, in a retrospective study, Faber[30] reported significant improvement in symptoms and quality of life from baseline with probiotic therapy. However, Kim and colleagues[31] conducted a randomized, double-blind, placebo-controlled trial and found more sobering and likely more accurate results. They found no overall symptomatic improvement associated with the probiotic they administered (although bloating did improve), and they also found no change in colonic transit.

Only high-quality randomized controlled trials will address the issue of whether probiotics have a place in the treatment of IBS. Furthermore, any benefit will need a mechanistic explanation, which at present is lacking.

Conclusion
This year's annual meeting of the American College of Gastroenterology has provided a forum for the presentation of new and important insights into IBS. Some truly exciting developments have emerged that will hopefully translate into improved patient outcomes as we begin to unravel this increasingly better understood disease entity.

References
Talley NJ, Spiller R. Irritable bowel syndrome: a little understood organic bowel disease? Lancet. 2002;360:555-564.
Hungin APS, Tack J, Mearin F, Whorwell PJ, Dennis E, Barghoui V. Irritable bowel syndrome (IBS): prevalence and impact in the USA - the truth in IBS (T-IBS) survey. Am J Gastroenterol. 2002;97:242. [Poster #460]
Saito YA, Schoenfeld P, Locke GR III. The epidemiology of irritable bowel syndrome in North America: a systematic review. Am J Gastroenterol. 2002;97:1910-1915.
Badia X, Mearin F, Balboa A, et al. Burden of illness in irritable bowel syndrome comparing Rome I and Rome II criteria. Pharmacoeconomics. 2002;20:749-758.
Koloski NA, Talley NJ, Boyce PM. Epidemiology and health care seeking in the functional GI disorders: a population-based study. Am J Gastroenterol. 2002;97:2290-2299.
Tuteja AK, Joos SK, Talley NJ, Hickam DH. Functional bowel disorders: a population based study of prevalence and risk factors. Am J Gastroenterol. 2002;97:241. [Poster #454]
Talley NJ. Serotonergic neuroenteric modulators. Lancet. 2001;358:2061-2068.
Hungin APS, Tack J, Mearin F, Whorwell PJ, Dennis E, Barghoui V. The truth in IBS (T-IBS) survey - healthcare utilization and medication use among IBS patients in the USA. Am J Gastroenterol. 2002;97:243. [Poster #461]
Sach JA, Chang L, Naliboff B, Emeran A. Are there gender specific predictors of health related quality of life (HRQOL) impairment in patients with irritable bowel syndrome? Am J Gastroenterol. 2002;97:122. [Abstract #41]
Crowell MD, Schattler-Duncan A, Dennis EH. Symptomatic differentiation of irritable bowel syndrome with constipation vs. functional constipation. Am J Gastroenterol. 2002;97:308. [Poster #721]
Garcia Rodriguez LA, Ruigomez A, Wallander MA, Johansson S, Olbe L. Detection of colorectal tumor and inflammatory bowel disease during follow-up of patients with initial diagnosis of irritable bowel syndrome. Scand J Gastroenterol. 2000;35:306-311.
KothandaRaman M, Turnbull GK, Valis TM. The pain experience by patients with irritable bowel syndrome. Am J Gastroenterol. 2002;97:308. [Poster #723]
Zaman MS, Robson KM, Lembo AJ. Overlap of irritable bowel syndrome (IBS) symptoms in patients with inflammatory bowel disease (IBD). Am J Gastroenterol. 2002;97:241. [Poster #455]
Fernandez-Banares F, Esteve-Pardo M, de Leon R, et al. Sugar malabsorption in functional bowel disease: clinical implications. Am J Gastroenterol. 1993;88:2044-2050.
Ledochowski M, Widner B, Bair H, Probst T, Fuchs D. Fructose- and sorbitol-reduced diet improves mood and gastrointestinal disturbances in fructose malabsorbers. Scand J Gastroenterol. 2000;35:1048-1052.
Gagliardi M, Beyer P, Pehlivanov N, McCallum R. Should we be testing for fructose tolerance in patients with GI complaints? Am J Gastroenterol. 2002;97:308. [Poster #724]
Choi YK, Jacdson M, Summers R, Rao S. Fructose intolerance and irritable bowel syndrome (IBS). Am J Gastroenterol. 2002;97:309. [Poster #725]
Adeniji OA, Barnett B, DiPalma JA. Durability of the irritable bowel syndrome. Am J Gastroenterol. 2002;97:121. [Abstract # 40]
Neal KR, Barker L, Spiller RC. Prognosis in post-infective irritable bowel syndrome: a six year follow up study. Gut. 2002;51:410-413.
Spears AD, Tuteja A, Frederick S, et al. Evaluation of the natural history and role of psychological factors in post-enteritis irritable bowel syndrome. Am J Gastroenterol. 2002;97:308. [Poster # 722]
Moses PL, Bannon C, Linden DR, Crowell MD, Sharkey KA, Mawe GM. Evidence for altered serotonin signalling in IBD and constipation predominant IBS. Am J Gastroenterol. 2002;97:240. [Poster #452]
Muller-Lissner SA, Fumagalli I, Bardhan KD, et al. Tegaserod, a 5-HT4 receptor partial agonist, relieves symptoms in irritable bowel syndrome patients with abdominal pain, bloating and constipation. Aliment Pharmacol Ther. 2001;15:1655-1666.
Dunger-Baldauf C, Rueegg PC, Lefkowitz M. Is relief from abdominal discomfort/pain in tegaserod treated IBS-C, patients due to an increased frequency of bowel movements. Am J Gastroenterol. 2002;97:177. [Poster #199]
Ruegg P, Lefkowitz M, Drossman D, Shi V. Tegaserod alone or in combination with antidepressant drugs is well tolerated in patients with IBS-C. Am J Gastroenterol. 2002;97:176. [Poster #195]
Earnest D, Rueegg PC, Dunger Baldauf C, Lefkowitz M. Diarrhea in patients treated with tegaserod for irritable bowel syndrome with constipation (IBS-C) is infrequent and usually self-limited. Am J Gastroenterol. 2002;97:177. [Poster #197]
Fidelholtz J, Smith W, Rawls J, et al. Safety and tolerability of tegaserod in patients with irritable bowel syndrome and diarrhea symptoms. Am J Gastroenterol. 2002;97:1176-1781.
Morganroth J, Ruegg PC, Dunger-Baldauf C, Appel-Dingemanse S, Bliesath H, Lefkowitz M. Tegaserod, a 5-hydroxytryptamine type 4 receptor partial agonist, is devoid of electrocardiographic effects. Am J Gastroenterol. 2002;97:2321-2327.
Hunter JO, Madden JA, Hunter JO. A review of the role of the gut microflora in irritable bowel syndrome and the effects of probiotics. Br J Nutr. 2002;88:67-72.
Bazzocchi G, Almerigi PF, Gionchetti P, Campieri M. Changes in symptoms, distension-stimulated colonic motility and in fecal microbiological features after oral bacteriotherapy in patients with diarrhea-predominant IBS (D-IBS) or with functional diarrhea (FD). Am J Gastroenterol. 2002;97:176. [Poster # 196]
Faber SM. Irritable bowel syndrome and reinoculation with probiotics. Am J Gastroenterol. 2002;97:211. [Poster #336]
Kim HJ, Camilleri M, McKinzie S, Burton D, Thomforde G, Zinsmeister AR. Effect of a probiotic, VSL#3 in diarrhea-predominant irritable bowel syndrome: a randomised, double blind, placebo controlled trial. Am J Gastroenterol. 2002;97:177. [Poster #200]

Copyright © 2002 Medscape.

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* Rotating Shift Workers At More Risk For Irritable Bowel Syndrome
HeatherAdministrator
04/12/10 11:39 AM
* Irritable bowel syndrome (IBS) does seem to run in families
HeatherAdministrator
04/02/10 11:14 AM
* IBS Does Not Increase Risk of Colon Cancer or IBD
HeatherAdministrator
03/12/10 11:30 AM
* Validation of Symptom-Based Diagnostic Criteria for Irritable Bowel Syndrome
HeatherAdministrator
03/11/10 01:53 PM
* Importance of early diagnosis in patients with irritable bowel syndrome
HeatherAdministrator
03/11/10 01:44 PM
* Altered profiles of intestinal microbiota and organic acids may be the origin of symptoms in irritable bowel syndrome
HeatherAdministrator
03/11/10 01:12 PM
* Constipation: a potential cause of pelvic floor damage?
HeatherAdministrator
09/29/09 12:10 PM
* Patients say they would give up 25% of their remaining life to be rid of IBS
HeatherAdministrator
08/28/09 01:21 PM
* IBS - it's the pain and the stigma
HeatherAdministrator
08/28/09 01:16 PM
* Wasington state retailers required to make bathrooms available to people with IBS and IBD
HeatherAdministrator
05/13/09 01:06 PM
* Development of an educational intervention for patients with Irritable Bowel Syndrome
HeatherAdministrator
02/06/09 12:20 PM
* Prevalence of Functional Gastrointestinal Disorders in Patients With Fibromyalgia and the Role of Psychologic Distress
HeatherAdministrator
01/22/09 04:47 PM
* Highlights of ACG's New Recommendations on IBS Therapies
HeatherAdministrator
01/09/09 11:10 AM
* Irritable Bowel Syndrome Can Have Genetic Causes
HeatherAdministrator
12/16/08 11:42 AM
* Is IBS part of a cascade of events?
HeatherAdministrator
10/27/08 10:56 AM
* Contributions of Pain Sensitivity and Colonic Motility to IBS Symptom Severity
HeatherAdministrator
10/21/08 02:38 PM
* Subgroup classification in irritable bowel syndrome patients over time
HeatherAdministrator
10/09/08 01:56 PM
* Genetic factors may play a role in IBS
HeatherAdministrator
09/26/08 02:52 PM
* Genetics of Irritable Bowel Syndrome
HeatherAdministrator
08/27/08 12:43 PM
* Irritable bowel syndrome: an international study of symptoms in eight countries
HeatherAdministrator
08/07/08 12:42 PM
* Gallstones, cholecystectomy and irritable bowel syndrome
HeatherAdministrator
04/22/08 04:01 PM
* Abdominal Bloating in Employed Adults: Prevalence, Risk Factors, and Association With Other Bowel Disorders
HeatherAdministrator
04/22/08 02:07 PM
* IBS is keeping me hostage!
HeatherAdministrator
03/14/08 11:12 AM
* Abdominal Bloating and Distension in Functional Gastrointestinal Disorders
HeatherAdministrator
02/28/08 03:16 PM
* Psychological distress and GI symptoms are related to severity of bloating
HeatherAdministrator
02/28/08 02:40 PM
* Irritable Bowel Syndrome's Possible Genetic Link
HeatherAdministrator
02/04/08 10:43 AM
* Patients with allergies appear to have a higher incidence of irritable bowel syndrome (IBS)
HeatherAdministrator
02/04/08 10:19 AM
* Train operator suffering from irritable bowel syndrome sues for lost wages
HeatherAdministrator
12/06/07 02:45 PM
* IBS may not affect small bowel transit time, but age does
HeatherAdministrator
10/24/07 01:56 PM
* Diagnostic work-up of IBS
HeatherAdministrator
10/24/07 12:15 PM
* Neural mechanisms of pelvic organ cross-sensitization.
HeatherAdministrator
10/10/07 11:41 AM
* Incidence and Prognosis of Post-Infectious Irritable Bowel Syndrome
HeatherAdministrator
09/13/07 11:21 AM
* Irritable bowel syndrome and the Rome III criteria: for better or for worse?
HeatherAdministrator
08/28/07 04:15 PM
* Quality of Life in Patients With IBD and IBS Differs Between Subjects Recruited from Clinic or the Internet
HeatherAdministrator
08/09/07 11:31 AM
* Fecal microbiota of irritable bowel syndrome patients differs significantly from that of healthy subjects
HeatherAdministrator
08/02/07 03:08 PM
* Irritable bowel syndrome and bloating
HeatherAdministrator
08/02/07 03:02 PM
* IBS And Restless Legs Syndrome Linked
HeatherAdministrator
08/02/07 02:50 PM
* Overlapping upper and lower gastrointestinal symptoms in irritable bowel syndrome patients
HeatherAdministrator
06/20/07 01:49 PM
* Bacterial Overgrowth Apparently NOT Important in IBS
HeatherAdministrator
06/06/07 10:51 AM
* Irritable bowel syndrome: patients' attitudes, concerns and level of knowledge
HeatherAdministrator
05/23/07 02:32 PM
* Influence of genetics on irritable bowel syndrome
HeatherAdministrator
05/23/07 02:25 PM
* Diarrhea-predominant irritable bowel syndrome and possible microscopic colitis
HeatherAdministrator
05/11/07 03:37 PM
* Breath Methane Levels Correlate With Constipation in IBS
HeatherAdministrator
04/28/07 10:13 AM
* 7 common myths – and facts – about IBS
HeatherAdministrator
04/11/07 04:17 PM
* Symptomatic overlap between irritable bowel syndrome and microscopic colitis
HeatherAdministrator
03/18/07 04:48 PM
* Reactions to a guided self-management intervention in a randomised controlled trial for IBS
HeatherAdministrator
03/18/07 04:39 PM
* Audit of Subtypes of Functional Constipation in a Gastroenterology Referral Center
HeatherAdministrator
03/18/07 04:26 PM
* New insights into the pathogenesis and pathophysiology of irritable bowel syndrome
HeatherAdministrator
03/01/07 01:17 PM
* Overly Anxious and Driven People Prone to Irritable Bowel Syndrome
HeatherAdministrator
03/01/07 12:37 PM
* Paid Participants Sought for Online IBS University Research Study
HeatherAdministrator
02/26/07 11:43 AM
* Physical activity and intestinal gas clearance in patients with bloating.
HeatherAdministrator
02/04/07 04:11 PM
* Familial Aggregation in Constipated Subjects
HeatherAdministrator
01/21/07 04:12 PM
* Participate in a research study looking at attitudes and opinions about people who have IBS
HeatherAdministrator
12/29/06 04:15 PM
* Most important barriers to the optimal management of patients with IBS-C and chronic constipation
HeatherAdministrator
12/01/06 01:23 PM
* Traveler's Diarrhea May Boost Risk of Irritable Bowel Syndrome
HeatherAdministrator
10/14/06 02:28 PM
* Irritable Bowel Syndrome Linked to Migraine, Fibromyalgia, and Depression
HeatherAdministrator
10/14/06 02:24 PM
* Restricted Fetal Growth Linked to Irritable Bowel Syndrome
HeatherAdministrator
10/14/06 02:21 PM
* The Science of IBS - Postinfectious IBS and Small Intestinal Bacterial Overgrowth
HeatherAdministrator
09/30/06 03:23 PM
* The Science of IBS - Environment and Genetics
HeatherAdministrator
09/17/06 02:36 PM
* Making a Positive Diagnosis of IBS
HeatherAdministrator
08/19/06 11:56 AM
* IBS -- Review and What's New - Abstract and Introduction
HeatherAdministrator
08/05/06 03:58 PM
* Treatment of Functional Diarrhea
HeatherAdministrator
07/17/06 01:54 PM
* Prevalence and Incidence of Chronic Constipation
HeatherAdministrator
07/05/06 05:35 PM
* Rome III Diagnostic Criteria
HeatherAdministrator
06/12/06 04:16 PM
* Determinants of Healthcare-Seeking Behaviour in IBS
HeatherAdministrator
06/04/06 11:48 AM
* Genetic cause for irritable bowel syndrome
HeatherAdministrator
05/29/06 01:48 PM
* Cytokines May Provide Marker for Irritable Bowel Syndrome
HeatherAdministrator
05/14/06 05:04 PM
* Introduction to IBS Constipation - the Problem
HeatherAdministrator
05/14/06 04:57 PM
* Gender, Age, Society, Culture, and the Patient's Perspective in IBS
HeatherAdministrator
05/13/06 03:16 PM
* What IBS Patients Need - But Don't Get - From Their Physicians
HeatherAdministrator
05/08/06 04:37 PM
* Antibiotic use and irritable bowel syndrome (IBS).
HeatherAdministrator
04/15/06 04:02 PM
* Older Versus Younger Patients with Irritable Bowel Syndrome
HeatherAdministrator
04/15/06 03:11 PM
* Prevalence of irritable bowel syndrome and depression in fibromyalgia
HeatherAdministrator
04/15/06 03:04 PM
* Intestinal serotonin signalling in irritable bowel syndrome
HeatherAdministrator
04/15/06 02:59 PM
* Gender-related differences in visceral perception in health and irritable bowel syndrome
HeatherAdministrator
04/15/06 02:47 PM
* Role of Stress, Infection, Inflammation in IBS
HeatherAdministrator
03/16/06 12:22 PM
* Pathophysiologic Mechanisms of IBS
HeatherAdministrator
03/16/06 12:16 PM
* Gum Chewing Stimulates Bowel Activity and Reduces Surgical Recovery Time
HeatherAdministrator
03/04/06 01:04 PM
* A bulging midriff roughly doubles women's chances of gallstone surgery
HeatherAdministrator
03/04/06 12:56 PM
* Lifestyle Factors and Symptoms of Gastro-oesophageal Reflux
HeatherAdministrator
02/18/06 01:42 PM
* IBS Patients Show Greater Brain Response to Subliminal Gut Stimuli
HeatherAdministrator
02/18/06 01:32 PM
* Discrepancies between Patient-Reported Outcomes and Clinician-Reported Outcomes in IBS
HeatherAdministrator
02/01/06 12:15 PM
* Distension technique influences the relationship between colonic and rectal hypersensitivity in IBS
HeatherAdministrator
02/01/06 12:04 PM
* Stability of Irritable Bowel Syndrome Using a Rome II-Based Classification
HeatherAdministrator
01/18/06 04:27 PM
* Digestive Woes May Keep the Overweight From Exercising
HeatherAdministrator
01/18/06 04:00 PM
* Possible role of nitric oxide in visceral hypersensitivity in patients with irritable bowel syndrome
HeatherAdministrator
01/08/06 05:03 PM
* A Survey on Patient Educational Needs in Irritable Bowel Syndrome
HeatherAdministrator
01/08/06 04:53 PM
* Gut motor function: immunological control in enteric infection and inflammation
HeatherAdministrator
12/21/05 12:41 PM
* Post-infectious Irritable Bowel Syndrome
HeatherAdministrator
12/19/05 04:55 PM
* Clinical Insights in IBS-C and Chronic Constipation
HeatherAdministrator
12/08/05 12:37 PM
* New Studies Gauge Knowledge, Attitudes and Preferences of Patients with Irritable Bowel Syndrome
HeatherAdministrator
11/12/05 01:30 PM
* The Genetics of Irritable Bowel Syndrome
HeatherAdministrator
11/12/05 01:10 PM
* Irritable Bowel Syndrome Study Shows That Targeted Antibiotics Lead To Long-lasting Improvement
HeatherAdministrator
11/12/05 01:00 PM
* Colonic Immune Activity and Blood T Lymphocytes in Patients With Irritable Bowel Syndrome
HeatherAdministrator
10/28/05 11:48 AM
* Brain activation responses to auditory stimuli in IBS
HeatherAdministrator
10/28/05 11:42 AM
* Functional Constipation Linked to Obesity in Children
HeatherAdministrator
10/11/05 01:43 PM
* Childhood Abdominal Pain May Progress to Adult Irritable Bowel Syndrome
HeatherAdministrator
10/11/05 01:36 PM
* Bronchial Hyperresponsiveness in Irritable Bowel Syndrome
HeatherAdministrator
10/11/05 01:16 PM
* The Impact of Somatization on the Use of Gastrointestinal Health-Care Resources in Patients with IBS
HeatherAdministrator
09/22/05 04:51 PM
* Abdominal Bloating - Four Factors
HeatherAdministrator
09/22/05 04:47 PM
* Abdominal Bloating
HeatherAdministrator
09/22/05 04:46 PM
* Guidelines for the Management of Dyspepsia
HeatherAdministrator
09/22/05 04:35 PM
* IBS and Functional Dyspepsia: Different Diseases or a Single Disorder With Different Manifestations?
HeatherAdministrator
09/13/05 01:03 PM
* Increased Prevalence of Obesity in Children With Functional Constipation
HeatherAdministrator
09/13/05 12:45 PM
* Irritable Bowel Syndrome: Toward an Understanding of Severity
HeatherAdministrator
09/01/05 11:19 AM
* How Do Symptoms in Chronic Constipation and IBS With Constipation Differ?
HeatherAdministrator
08/22/05 04:51 PM
* Role of Carbon Dioxide-Releasing Suppositories in the Treatment of Chronic Functional Constipation
HeatherAdministrator
08/22/05 04:32 PM
* Physiological Mechanisms Underlying Perceptions of Nausea and Stomach Fullness
HeatherAdministrator
08/07/05 04:33 PM
* Gastrointestinal infections can have lasting consequences as IBS
HeatherAdministrator
08/07/05 04:08 PM
* Dyspepsia and Irritable Bowel Syndrome After a Salmonella Gastroenteritis Outbreak
HeatherAdministrator
07/24/05 02:48 PM
* Abdominal Radiography Not Useful in Constipated Children
HeatherAdministrator
07/24/05 02:30 PM
* IBS—The Irritation of Inflammation
HeatherAdministrator
07/24/05 02:16 PM
* Irritable Bowel Syndrome in the United States: Prevalence, Symptom Patterns and Impact
HeatherAdministrator
07/05/05 03:40 PM
* IBS: Improving Diagnosis, Serotonin Signaling, and Implications for Treatment
HeatherAdministrator
07/05/05 03:30 PM
* Neural Cross-Talk May Explain Overlap of Irritable Bowel, Interstitial Cystitis
HeatherAdministrator
07/05/05 03:11 PM
* Health Economics of IBS
HeatherAdministrator
07/05/05 03:01 PM
* Overlapping Upper and Lower Gastrointestinal Symptoms in Irritable Bowel Syndrome
HeatherAdministrator
06/20/05 03:52 PM
* Diagnostic Yield of Alarm Features in Irritable Bowel Syndrome
HeatherAdministrator
06/20/05 03:44 PM
* Colon Cancer Test Misses Growths in Women
HeatherAdministrator
06/05/05 05:56 PM
* Nongastrointestinal symptoms of irritable bowel syndrome
HeatherAdministrator
05/22/05 07:14 PM
* Partnering With Gastroenterologists to Evaluate Patients With Chronic Constipation
HeatherAdministrator
05/08/05 06:16 PM
* Impairment in Work Productivity and Health-related Quality of Life in Patients With IBS
HeatherAdministrator
05/08/05 06:11 PM
* Nerves, Reflexes, and the Enteric Nervous System: Pathogenesis of the Irritable Bowel Syndrome
HeatherAdministrator
05/08/05 06:06 PM
* What Does the Future Hold for Irritable Bowel Syndrome
HeatherAdministrator
05/08/05 06:02 PM
* Towards a better understanding of abdominal bloating and distension in functional GI disorders
HeatherAdministrator
04/24/05 03:40 PM
* IBS is a risk factor for GERD
HeatherAdministrator
04/10/05 06:25 PM
* New Recommendations for Treating Children With Chronic Abdominal Pain
HeatherAdministrator
03/28/05 01:59 PM
* Irritable bowel syndrome in developing countries
HeatherAdministrator
03/28/05 01:29 PM
* Stress and the gastrointestinal tract
HeatherAdministrator
03/28/05 01:27 PM
* Alternating Bowel Habit Subtype in Patients with Irritable Bowel Syndrome
HeatherAdministrator
03/28/05 12:28 PM
* Fecal Microbiota of Irritable Bowel Syndrome Patients
HeatherAdministrator
03/04/05 12:11 PM
* Post-infectious IBS in patients with Shigella infection
HeatherAdministrator
03/04/05 12:03 PM
* Surgical Treatment of Chronic Functional Constipation?
HeatherAdministrator
03/04/05 11:24 AM
* Chronic constipation in children
HeatherAdministrator
02/19/05 05:53 PM
* Intestinal infection and irritable bowel syndrome.
HeatherAdministrator
02/19/05 05:36 PM
* Overlap of GI symptom complexes in a US community
HeatherAdministrator
02/06/05 02:35 PM
* Magnetic pill tracking: a novel non-invasive tool for investigation of human digestive motility
HeatherAdministrator
02/06/05 02:27 PM
* The value of a general therapeutic approach in subjects with irritable bowel syndrome
HeatherAdministrator
02/06/05 02:22 PM
* Is Constipation Associated with Decreased Physical Activity in Normally Active Subjects?
HeatherAdministrator
02/06/05 02:18 PM
* High interdigestive and postprandial motilin levels in patients with the irritable bowel syndrome
HeatherAdministrator
02/06/05 02:12 PM
* 10% to 20% of older adults have IBS
HeatherAdministrator
01/23/05 05:05 PM
* Diagnostic Criteria for Irritable Bowel Syndrome - Family Practice Doctors Unaware of Guidelines
HeatherAdministrator
01/07/05 06:20 PM
* Stress Increases Visceral Sensitivity in IBS Patients
HeatherAdministrator
01/07/05 06:13 PM
* Treatment of irritable bowel syndrome with colonic pacing
HeatherAdministrator
01/07/05 05:53 PM
* Irritable bowel syndrome: colonoscopy painful and difficult?
HeatherAdministrator
01/07/05 05:50 PM
* Suicide in IBS patients emphasizes need for improvements in treatment
HeatherAdministrator
01/07/05 05:47 PM
* New Risk for Asthma, Allergy Found in the Gut
HeatherAdministrator
01/07/05 04:53 PM
* Salt intake and smoking play major roles in GERD
HeatherAdministrator
12/20/04 02:11 PM
* Constipation and Laxative Use Found to Increase Colon Cancer Risk
HeatherAdministrator
12/20/04 01:30 PM
* Link Between Irritable Bowel Syndrome (IBS), Alcoholism and Mental Illness
HeatherAdministrator
12/20/04 01:24 PM
* Complementary and alternative medicine in gastroenterology
HeatherAdministrator
12/20/04 01:16 PM
* Advances in the Treatment of Chronic Constipation
HeatherAdministrator
11/28/04 02:55 PM
* Symptom patterns in functional dyspepsia and irritable bowel syndrome
HeatherAdministrator
11/28/04 02:34 PM
* Obese Women Face Higher Risk of Colorectal Cancer
HeatherAdministrator
11/08/04 04:48 PM
* Obesity is Associated With Increased Risk of Gastrointestinal Symptoms
HeatherAdministrator
10/24/04 07:42 PM
* Stress Therapy Can Help Irritable Bowel
HeatherAdministrator
10/24/04 07:38 PM
* Relationship Between Colon Ischemia, Irritable Bowel Syndrome
HeatherAdministrator
10/11/04 04:15 PM
* Clinical Update on the Treatment of Constipation in Adults
HeatherAdministrator
10/11/04 03:34 PM
* Racial Differences in the Impact of Irritable Bowel Syndrome on Health-Related Quality of Life
HeatherAdministrator
10/11/04 03:25 PM
* What Differentiates Chronic Constipation From IBS With Constipation?
HeatherAdministrator
09/26/04 03:25 PM
* Treatment options in irritable bowel syndrome
HeatherAdministrator
09/26/04 02:57 PM
* Diagnostic approach to suspected irritable bowel syndrome
HeatherAdministrator
09/12/04 03:38 PM
* Dyssynergic Defecation: Demographics, Symptoms, Stool Patterns, and Quality of Life
HeatherAdministrator
09/12/04 03:35 PM
* Small Intestinal Bacterial Overgrowth - A Framework for Understanding IBS
HeatherAdministrator
08/30/04 01:46 PM
* New views - and some respect - for IBS
HeatherAdministrator
08/30/04 01:25 PM
* Categorization of dysmotility in patients with chronic constipation
HeatherAdministrator
08/08/04 02:54 PM
* Prevalence of IBS according to different diagnostic criteria
HeatherAdministrator
08/08/04 02:50 PM
* Irritable Bowel Can Follow Dysentery
HeatherAdministrator
08/08/04 02:37 PM
* Irritable Bowel Syndrome Remains a Difficult Condition to Manage
HeatherAdministrator
07/24/04 02:09 PM
* Intolerance to visceral distension in functional dyspepsia or irritable bowel syndrome
HeatherAdministrator
07/24/04 02:17 PM
* Bacillary dysentery as a causative factor of irritable bowel syndrome and its pathogenesis
HeatherAdministrator
07/24/04 01:42 PM
* Irritable Bowel Syndrome Linked to High Rates of Various Surgeries
HeatherAdministrator
07/11/04 02:15 PM
* Drug-Free Ways to Treat IBS
HeatherAdministrator
07/11/04 01:47 PM
* Irritable Bowel Syndrome - An Evidence-Based Approach to Diagnosis
HeatherAdministrator
06/27/04 01:14 PM
* Biases Affect Treatment of IBS
HeatherAdministrator
06/04/04 06:45 PM
* Moms with Bowel Symptoms Take Baby to Doctor More
HeatherAdministrator
05/25/04 11:53 AM
* Natural History of Irritable Bowel Syndrome
HeatherAdministrator
05/10/04 02:36 PM
* Intestinal Gas May Contribute to IBS Symptoms
HeatherAdministrator
05/10/04 02:29 PM
* Are Your Bowels Irritable? IBS Awareness Month is Here
HeatherAdministrator
04/09/04 07:11 PM
* Heartburn May Not Reflect Gastroesophageal Reflux Disease Severity
HeatherAdministrator
03/30/04 02:43 PM
* A link between irritable bowel syndrome and fibromyalgia
HeatherAdministrator
03/30/04 01:46 PM
* Diverticular Disease: Electrophysiologic Study and a New Concept of Pathogenesis
HeatherAdministrator
03/09/04 11:48 AM
* New Syndrome Connects Gallbladder Dysfunction And Chronic Diarrhea
HeatherAdministrator
03/09/04 11:45 AM
* Researchers Pioneer Accessible, Cost-Effective Treatments for IBS
HeatherAdministrator
03/08/04 06:48 PM
* Splitting IBS: from original Rome to Rome II criteria
HeatherAdministrator
02/10/04 02:35 PM
* Utilization patterns and net direct medical cost to Medicaid of IBS
HeatherAdministrator
02/10/04 02:34 PM
* Family practitioners' attitudes and knowledge about IBS
HeatherAdministrator
02/10/04 02:32 PM
* The Effect of Somatization on Gastrointestinal and Extraintestinal Symptoms of IBS
HeatherAdministrator
01/26/04 03:26 PM
* Surgery and IBS
HeatherAdministrator
01/26/04 03:21 PM
* IBS Subgroups by Bowel Habit Predominance
HeatherAdministrator
01/26/04 03:13 PM
* Visceral perception thresholds in irritable bowel syndrome
HeatherAdministrator
01/07/04 11:56 AM
* Electric activity of the colon in irritable bowel syndrome
HeatherAdministrator
01/07/04 11:52 AM
* Irritable Bowel Syndrome's Possible Genetic Link
HeatherAdministrator
01/07/04 11:40 AM
* Intestinal gas distribution determines abdominal symptoms
HeatherAdministrator
12/16/03 12:27 PM
* Faecal incontinence - Many treatment options now exist
HeatherAdministrator
12/16/03 12:17 PM
* Abnormal Colonic Propagated Activity in Patients with Constipation
HeatherAdministrator
12/16/03 12:07 PM
* Colonic Propulsive Impairment in Intractable Slow-Transit Constipation
HeatherAdministrator
12/16/03 12:03 PM
* Overlapping upper and lower GI symptoms in IBS patients with constipation or diarrhea
HeatherAdministrator
12/01/03 05:51 PM
* Familial aggregation of irritable bowel syndrome
HeatherAdministrator
12/01/03 05:49 PM
* Outlook affects bowel disorder patients
HeatherAdministrator
11/18/03 03:30 PM
* Doctors unmoved by bowel misery
HeatherAdministrator
11/18/03 03:28 PM
* Travelers' Diarrhoea Can Trigger Irritable Bowel
HeatherAdministrator
11/04/03 03:21 PM
* Mind-Body Technique Eases Kids' Gut Pain
HeatherAdministrator
10/30/03 11:17 AM
* Molecular Alterations In Patients With Irritable Bowel Syndrome
HeatherAdministrator
10/20/03 03:46 PM
* Three in Four People With IBS Also Have Functional Dyspepsia
HeatherAdministrator
10/15/03 03:28 PM
* Infectious Gastroenteritis Linked to Irritable Bowel Syndrome
HeatherAdministrator
09/30/03 02:27 PM
* Association Between Pain Episodes & High Amplitude Pressure Waves in IBS
HeatherAdministrator
09/16/03 03:54 PM
* Constipation and its management
HeatherAdministrator
09/16/03 03:41 PM
* Contributions of suggestion, desire, and expectation to placebo effects in IBS patients
HeatherAdministrator
09/16/03 03:28 PM
* Do published guidelines for evaluation of IBS reflect practice?
HeatherAdministrator
08/30/03 02:40 PM
* Cognitive-behavioral therapy versus education and desipramine versus placebo for IBS
HeatherAdministrator
08/12/03 12:54 PM
* Distinctive features of postinfective irritable bowel syndrome
HeatherAdministrator
07/28/03 03:18 PM
* UCLA/CURE Neuroenteric Disease Program Newsletter
HeatherAdministrator
07/23/03 10:38 AM
* Bacterial Overgrowth in IBS
HeatherAdministrator
07/18/03 12:15 PM
* Diagnosis of irritable bowel syndrome.
HeatherAdministrator
07/18/03 11:54 AM
* Eradication of small intestinal bacterial overgrowth reduces symptoms of IBS
HeatherAdministrator
07/18/03 11:44 AM
* Antibiotics increase functional abdominal symptoms.
HeatherAdministrator
07/18/03 11:41 AM
* Treatment of the irritable bowel syndrome.
HeatherAdministrator
07/15/03 11:02 PM
* Extraintestinal symptoms in IBS and IBD
HeatherAdministrator
07/15/03 06:21 PM
* Postinfectious irritable bowel syndrome.
HeatherAdministrator
07/15/03 06:19 PM
* Dieting severity and GI symptoms in college women.
HeatherAdministrator
07/15/03 01:13 PM
* Functional GI disorders and eating disorders - Relevance of the association
HeatherAdministrator
07/15/03 11:14 AM
* Features of eating disorders in patients with IBS
HeatherAdministrator
07/15/03 11:12 AM
* New and Important Insights Into IBS
HeatherAdministrator
07/14/03 03:24 PM
* The Irritable Bowel Syndrome-Fibromyalgia Connection
HeatherAdministrator
07/14/03 03:19 PM
* Update on Treatment of Functional Gastrointestinal Disorders
HeatherAdministrator
07/14/03 02:55 PM
* Irritable bowel syndrome in primary care: The patients’ and doctors’ views
HeatherAdministrator
07/14/03 02:43 PM
* Inflammatory bowel disease and irritable bowel syndrome: separate or unified?
HeatherAdministrator
07/14/03 02:32 PM

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