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Background & Aims-There have been few published studies of clinical and psychological characteristics of patients with functional diarrhea (FDr). We studied the clinical and psychological characteristics of patients with FDr presenting to a tertiary care clinic, and compared symptom profiles of FDr with those of IBS-diarrhea (IBS-D).Methods-Consecutive patients with a diagnosis of FDr (n=48) or IBS-D (n=49), per Rome IV criteria, completed a detailed symptom survey from October 2017 through July 2018. Abdominal pain and diarrhea severity were assessed using patient-reported outcomes measurement information system (PROMIS) questionnaires. Patients with anxiety, depression, or sleep disturbances were identified based on PROMIS T-score of 60 or more. Mean and proportions were compared using the Student t test and χ 2 analyses, respectively.Results-A significantly lower proportion of patients with FDr reported abdominal pain (77.1%) than patients with IBS-D (100%, P<.001). The proportion of patients reporting abdominal bloating and level of severity did not differ significantly between groups. Proportions of bowel movements with diarrhea did not differ significantly between groups (P=.54), but the mean diarrhea PROMIS T-score was significantly higher among patients with IBS-D (P=.03). This difference resulted from the significantly higher levels of fecal urgency-related distress reported by patients with IBS-D (P=.007). Proportions of patients with anxiety, depression, or sleep disturbance, and their severities, did not differ significantly between groups.

Background Fecal urgency is a symptom generally associated with diarrhea but is also reported by patients with constipation. Our aim was to (a) assess the prevalence and burden of fecal urgency in constipated patients (b) evaluate gastrointestinal and psychiatric predictors of moderate to severe fecal urgency in these patients. Methods Patients presenting consecutively to a tertiary outpatient gastroenterology clinic with constipation were included. Patients were considered to have moderate to severe fecal urgency if ≥50% of bowel movements (BMs) in the past 3 months were associated with fecal urgency. Anxiety, depression, and sleep disturbance were diagnosed using a Patient‐Reported Outcomes Measurement Information System (PROMIS) t‐score of ≥60. Abdominal pain and constipation severity were also assessed using PROMIS questionnaires. Univariable and stepwise logistic regression were used to identify predictors of moderate to severe fecal urgency. Key results Of 139 constipated patients, 70.8% reported experiencing fecal urgency in the past 3 months and 25.8% reported being significantly bothered by it. Moderate to severe fecal urgency was reported by 27% of 139 patients. Frequency of loose stools (OR 1.5, 95% CI 1.1, 2.0) and presence of anxiety (OR 2.3, 95% CI 1.1, 5.0) were independent predictors of moderate to severe fecal urgency. Conclusions and inferences Fecal urgency is common in patients with constipation and is frequently bothersome to many patients. We identified clinical and psychiatric factors associated with moderate to severe fecal urgency in constipated patients with potential therapeutic implications if validated in future studies.

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