Irritable bowel syndrome in patients discharged from surgical wards with non-specific abdominal pain

Clinically Diagnosed Acute Diverticulitis in Outpatients: Misdiagnosis in Patients with Irritable Bowel Syndrome

BACKGROUND

Physicians often diagnose diverticulitis and prescribe antibiotics in outpatients with abdominal pain and tenderness without other evidence.

AIM

We investigated the misattribution of irritable bowel syndrome (IBS) symptoms to diverticulitis in outpatients.

METHODS

In patients diagnosed with diverticulitis and dispensed antibiotics in an integrated healthcare system, we retrospectively compared 15,846 outpatients managed without computed tomography (CT) versus 3750 emergency department/inpatients who had CT. We assessed demographics and past history, including 17 symptom-based somatic and 11 mental disorders and three somatic-mental comorbidity pairs (dyads) coded over 3 years and seven drug classes dispensed over 1 year before diagnosis.

RESULTS

Univariate analysis showed small intergroup demographic differences. Outpatients had increases in prior diverticulitis, including outpatient-managed episodes, total somatic diagnoses (p < .0001), eight somatic and three mental disorders (p ≤ .015), all three dyads (p ≤ .05), and dispensing of three drug classes (p ≤ .016). IBS had been diagnosed in 2399 (15.1 %) outpatients versus 361 (9.6 %) emergency department/inpatients (p < .0001), the greatest increase in any comorbidity. Emergency department/inpatients had no somatic comorbidity more often but more alcohol dependence, non-dependent drug abuse, and opioid dispensing (p ≤ .05). Regression analysis revealed outpatient care was independently positively associated with younger age, non-Hispanic white race/ethnicity, less Charlson comorbidity, diverticulitis history, IBS, chest pain, dyspepsia, fibromyalgia, low back pain, migraine, acute reaction to stress, and antispasmodic and anxiolytic dispensing and negatively associated with non-dependent drug abuse and opioid dispensing (p ≤ .0226).

CONCLUSIONS

Multiple types of indirect and concordant evidence suggest misattribution of IBS pain to diverticulitis and unnecessary antibiotic therapy in outpatients.

Non-specific abdominal pain and air pollution: a novel association

Background

We studied whether short-term exposure to air pollution was associated with non-specific abdominal pain in epidemiologic and animal studies.

Methods

Patients visiting the emergency department with non-specific abdominal pain were identified in Edmonton (1992 to 2002, n = 95,173) and Montreal (1997 to 2002, n = 25,852). We calculated the daily concentrations for ozone (O₃), nitrogen dioxide (NO₂), sulfur dioxide (SO₂), carbon monoxide (CO), and particles <10 (PM₁₀) or <2.5 (PM_2.5) µm. A case crossover study design was used to estimate the odds ratio (OR) and 95% confidence interval (CI) associated with an increase in the interquartile range of the air pollutants. We investigated differential effects by age and sex. Mice were gavaged with urban particle extracts. In animal models, colonic motility was tested, and visceral abdominal pain was measured using a writhing test, and behavioral response to oil of mustard and neostigmine. Motility and pain was measured acutely (1.5 hours after gavage) and chronically (7-days and 21-days after gavage).

Results

Emergency department visits for non-specific abdominal pain were primarily by women between the ages of 15–24 years. Individuals aged 15 to 24 years were at increased risk of non-specific abdominal pain in Edmonton (same day CO: OR = 1.04, 95% CI = 1.02–1.06; and NO₂: OR = 1.06, 95% CI = 1.03–1.09). The risk of air pollution among 15–24 year olds in Montreal was significantly positive (same day CO: OR = 1.11, 95% CI = 1.05–1.17; NO₂: OR = 1.09, 95% CI = 1.01–1.16; SO₂: OR = 1.17, 95% CI = 1.10–1.25; PM_2.5: OR = 1.09, 95% CI = 1.04–1.15). Abdominal pain was increased by an acute gavage of pollution extract but not to chronic exposure to pollutants. Colonic transit was delayed following chronic but not acute exposure with the pollutants.

Conclusions

Epidemiological and animal data suggest that short-term exposure to air pollution may trigger non-specific abdominal pain in young individuals.

Importance of early diagnosis in patients with irritable bowel syndrome

Patients with irritable bowel syndrome (IBS) account for >$20 billion in direct and indirect costs annually, a large portion of which relates to making the diagnosis. The diagnosis of IBS is challenging because symptoms can vary between patients and overlap with those of other disorders. This review examines the current diagnostic approach in IBS and discusses new tools that may improve diagnostic confidence earlier in the process. The prevalence of organic disease among patients who meet symptom-based criteria for IBS (eg, Rome III) is generally low; therefore, in the absence of "alarm features," the probability for organic disease is very low. Increased public awareness of IBS symptoms and physician awareness of symptom-based criteria for IBS are needed to facilitate earlier diagnosis. Accumulating evidence suggests that fecal and/or serum biomarkers may be helpful in differentiating IBS from non-IBS disorders. These tools may help minimize unnecessary testing and diagnostic delays. As biomarkers are further studied and developed, they are likely to become an integral part of the diagnosis of IBS and reduce the potential for incorrect diagnosis and treatment delays.

Does coeliac disease affect colorectal practice?

INTRODUCTION

Screening studies of healthy volunteers have determined that coeliac disease affects 1% of the adult European population. Despite this, the majority of cases are unrecognised. Coeliac disease often presents in adults with non-specific gastrointestinal symptoms. This may suggest that unrecognised cases are being seen in colorectal clinics with vague gastrointestinal symptoms, iron deficiency anaemia or irritable bowel syndrome. In addition, cases of coeliac disease may also be presenting as an emergency admission with non-specific abdominal pain.

OBJECTIVE

This review provides an update of the published data on case finding for coeliac disease, with the aim of improving the recognition of this disease in clinical practice.

Physicians' attitudes and practices in the evaluation and treatment of irritable bowel syndrome

OBJECTIVE

Irritable bowel syndrome (IBS) is a common disorder characterized by abdominal discomfort and disordered bowel habits. Despite the high prevalence of IBS, little is known about how physicians perceive this condition. The aims of our study were to measure physicians' understanding of IBS, to assess their attitudes towards patients with IBS, and to determine whether there are differences in the way Internal Medicine physicians (IM), Family Practice physicians (FP), and Gastroenterology physicians (GI) evaluate and treat IBS patients.

MATERIAL AND METHODS

A survey was sent to 3000 physicians nationwide, 1000 each to IM, FP, and GI. The survey contained 35 questions assessing demographics, the etiology and pathophysiology of IBS, the use of diagnostic tests, and practice patterns and attitudes.

RESULTS

Of the deliverable questionnaires, 501 were returned completed; 472 of the respondents interviewed only adult patients, representing the cohort for this analysis. The mean age of all respondents was 47; most were men (80%). IM and FP made a new diagnosis of IBS 1.3-1.6 times each week, while GI made a new diagnosis 5.4 times each week (p<0.0001). Compared with the perceptions of FP and IM, GI felt that IBS patients were less sick than other patients (p<0.001), although they required more time per visit. More GI compared with FP and IM stated that prior infection and a history of abuse were the causes of IBS (p<0.01), while FP were more likely to believe that diet was a cause of IBS (p<0.01). GI felt a new diagnosis of IBS could be made without further testing 42% of the time. FP and IM felt that one-third of IBS patients needed referral to a GI.

CONCLUSIONS

The attitudes and practice patterns of physicians towards patients with IBS differ depending on practice specialty. This may be due to differences in training, the ability to perform specialized tests, and/or differences in referral patterns. Further training may improve the ability of physicians in all specialties confidently to diagnose and treat patients with IBS.

A new insight into non-specific abdominal pain

This review aims to change clinical practice and alert clinicians to consider that unrecognised coeliac disease may present acutely with abdominal pain. Targeting patients who have non-specific abdominal pain or coeliac-associated symptoms/diseases may improve diagnosis.

Do patients with unrecognized coeliac disease present as an emergency?

Screening studies of healthy volunteers have determined that coeliac disease affects 1% of the European population. Despite this the majority of cases are unrecognized. Coeliac disease may occasionally present as an acute emergency. Recent data, however, suggest that cases of undiagnosed coeliac disease may present to emergency departments with nonspecific abdominal pain. This review provides an update of the published data on coeliac disease. We discuss the relationship between coeliac disease and abdominal pain and ways in which this may change emergency physicians practice.

Association of adult celiac disease with surgical abdominal pain: a case-control study in patients referred to secondary care

BACKGROUND

Acute abdominal pain is the most common indication for surgical admission. Nonspecific abdominal pain (NSAP) may account for up to 40% of cases. There has been no published prospective study in which adult patients presenting with acute abdominal pain are investigated for celiac disease.

AIMS

We aimed to assess the association of celiac disease with surgical abdominal pain.

PATIENTS AND METHODS

A case-control study was undertaken involving 300 consecutive new unselected patients presenting with acute abdominal pain (in a university hospital) and healthy controls (age and sex matched) without abdominal pain (n = 300). Initial investigations for celiac disease were immunoglobulins, IgA/IgG anti-gliadin (AGA), and endomysial antibodies (EMA). Any patient with a positive IgA AGA, EMA, or only IgG AGA in the presence of IgA deficiency was offered a small bowel biopsy to confirm the diagnosis.

RESULTS

: There were 33 patients with abdominal pain who had positive antibodies, of whom 9 had histologically confirmed celiac disease (6 EMA positive; 3 EMA negative). One antibody positive patient (EMA in isolation) declined duodenal biopsy and the remaining 23 had normal duodenal mucosa. Within the control group, there were 2 cases of celiac disease. Compared with matched controls the association of acute abdominal pain with celiac disease gave an odds ratio 4.6. (P = 0.068, 95% confidence interval, 1.11-19.05). When only considering NSAP the prevalence of celiac disease was highly significant at 10.5% (9 of 86, P = 0.006). Patients' symptoms improved on a gluten-free diet at 12- to 18-month follow-up.

CONCLUSION

Celiac disease was diagnosed in 3% of patients who presented with unselected acute abdominal pain to secondary care. Targeting patients who have NSAP or celiac associated symptoms/diseases may improve the diagnostic yield.

Systematic review: Abdominal and pelvic surgery in patients with irritable bowel syndrome

AIM

To systematically review research on the prevalence of abdominal and pelvic surgery in patients with irritable bowel syndrome.

METHODS

Computer searches of MEDLINE, EMBASE and Current Contents were performed independently by both investigators to identify appropriate studies. Primary study selection criteria included: (i) population-based samples of adult irritable bowel syndrome patients; (ii) the use of appropriate symptom-based criteria to identify irritable bowel syndrome patients; and (iii) comparison of the prevalence of abdominal and pelvic surgery in irritable bowel syndrome patients vs. control populations. Secondary analysis was performed on published studies of referral populations and case series.

RESULTS

Two population-based studies met the primary study selection criteria and revealed an increased prevalence of surgery in irritable bowel syndrome patients vs. controls for cholecystectomy (4.6% vs. 2.4%, respectively; odds ratio, 1.9; 95% confidence interval, 1.2-3.2) and hysterectomy (18% vs. 12%, respectively; odds ratio, 1.6; 95% confidence interval, 1.1-2.2). Secondary analysis revealed an increased prevalence of appendectomy and other abdominal and pelvic surgery in irritable bowel syndrome patients.

CONCLUSIONS

Irritable bowel syndrome is associated with a disproportionately high prevalence of abdominal and pelvic surgery, but most studies exhibit sub-optimal study design and do not define the factors causing the increased prevalence of surgery in these patients.