Background
Adults with irritable bowel syndrome (IBS) frequently identify foods as exacerbating their gastrointestinal (GI) symptoms. In children with IBS the prevalence of perceived food intolerances and their impact are unknown.
Objectives
To determine the prevalence of self-perceived food intolerances and the relationship of these intolerances to abdominal pain, psychosocial distress, and quality of life in children with IBS.
Design
Cross-sectional; questionnaire and prospective diary data were collected from 2008–2014 by trained research coordinators.
Participants/Setting
Children 7–18 years (pediatric Rome III IBS, n=154; age-sex matched healthy children (HC), n=32) in Houston, Texas.
Measures
Perceived food intolerances and avoided foods were captured using the Childhood Food and Symptom Association Questionnaire. IBS severity was assessed by a ≥7-day Pain Diary and validated psychosocial questionnaires assessing quality of life, somatization, functional disability, depression, and anxiety.
Statistical Analyses Performed
Descriptive, Spearman bivariate correlation, chi-square, Poisson log-linear generalized model with Wald chi-square statistics.
Results
A greater proportion of children with IBS (143/154, 92.9%) vs HC (20/32, 62.5%) identified at least one self-perceived food intolerance (χ2=22.5, P<0.001). Children with IBS identified a greater number (median [25=75%]=4[2–6]) of perceived symptom-inducing foods than HC (median=2[0–4]; χ2=28.6,P<0.001). Children with IBS avoided more foods (median=2[1–4]) than HC (median=0 [0–2.75]; χ2=20.8, P<0.001). The number of self-perceived food intolerances was weakly associated (r-value range of −0.17 to 0.21) with pain frequency, pain severity, somatization, anxiety, functional disability, and decreased quality of life.
Conclusions
Children with IBS have a high prevalence of self-perceived food intolerances; the number of these intolerances is weakly associated with measures of IBS severity.