Bowel and Bladder Dysfunction Is Associated with Psychiatric Comorbidities and Functional Impairment in Pediatric Obsessive-Compulsive Disorder.

Objective: Neuropsychiatric disorders are common in children with bowel and bladder dysfunction (BBD), a syndrome associated with urinary frequency, urgency, holding, incontinence, and constipation. We evaluated BBD symptom severity in children and youth attending a tertiary care obsessive-compulsive disorder (OCD) clinic. Methods: Consecutive patients attending initial OCD assessments between 2016 and 2020 were invited to participate in a registry study. Diagnosis of OCD and comorbidities was established by structured clinical interview. OCD severity and impact were assessed with the Children's Yale-Brown Obsessive-Compulsive Scale (CY-BOCS) and the Child Obsessive Compulsive Impact Scale (COIS-R; self-report), respectively. BBD symptoms were quantified with the Vancouver Symptom Score (VSS), a validated self-report measure. Results: One hundred twelve participants completed the VSS (mean age 13.5 ± 3.3, range 7-20). Based on a cutoff score of 11 corresponding to pediatric urologist-diagnosed BBD, 30.4% of participants screened positive, including more females than males (39.3% vs. 21.4%; p = 0.04). Daytime urinary incontinence was present in a greater proportion of participants with OCD forbidden thoughts (34.8% vs. 8.2%, p = 0.002), major depressive disorder (MDD; 38.5% vs. 6.8%, p = 0.001), and somatization disorder (60% vs. 9%, p = 0.001) compared with those without. A regression model including CY-BOCS, COIS-R, psychiatric comorbidities, medications, age, and gender explained 52.2% of the variance in VSS; COIS-R, tic disorder, and MDD were significant predictors. Conclusion: BBD symptoms are common and associated with high OCD-related impairment and psychiatric comorbidities. Standardized assessment may facilitate identification of BBD symptoms in this population and is critical to mitigating long-term physical and mental health impacts. Further studies are required to assess the relationship between BBD and OCD treatment outcomes.