BACKGROUND: Adults with irritable bowel syndrome (IBS) frequently identify foods as exacerbating their gastrointestinal symptoms. In children with IBS, the prevalence of perceived food intolerances and their impact are unknown. OBJECTIVE: Our aim was 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: We conducted a cross-sectional study. Questionnaire and prospective diary data were collected from 2008 to 2014 by trained research coordinators. PARTICIPANTS/ SETTING: Participants were children 7 to 18 years old (pediatric Rome III IBS, n=154; age-sex matched healthy children, n=32) in Houston, TX. 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: We used descriptive Spearman bivariate correlation, χ(2), and Poisson log-linear generalized model with Wald χ(2) statistics. RESULTS: A greater proportion of children with IBS (143 of 154 [92.9%]) vs healthy children (20 of 32 [62.5%]) identified at least one self-perceived food intolerance (χ(2)=22.5; P<0.001). Children with IBS identified a greater number (median=4 [25% to 75% quartile=2 to 6]) of perceived symptom-inducing foods than healthy children (median=2 [25% to 75% quartile=0 to 4]; χ(2)=28.6; P<0.001). Children with IBS avoided more foods (median=2 [25% to 75% quartile=1 to 4]) than healthy children (median=0 [25% to 75% quartile=0 to 2.75]; χ(2)=20.8; P<0.001). The number of self-perceived food intolerances was weakly associated (r value range= -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.
BACKGROUND: Adults with irritable bowel syndrome (IBS) frequently identify foods as exacerbating their gastrointestinal symptoms. In children with IBS, the prevalence of perceived food intolerances and their impact are unknown. OBJECTIVE: Our aim was 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: We conducted a cross-sectional study. Questionnaire and prospective diary data were collected from 2008 to 2014 by trained research coordinators. PARTICIPANTS/ SETTING:Participants were children 7 to 18 years old (pediatric Rome III IBS, n=154; age-sex matched healthy children, n=32) in Houston, TX. 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: We used descriptive Spearman bivariate correlation, χ(2), and Poisson log-linear generalized model with Wald χ(2) statistics. RESULTS: A greater proportion of children with IBS (143 of 154 [92.9%]) vs healthy children (20 of 32 [62.5%]) identified at least one self-perceived food intolerance (χ(2)=22.5; P<0.001). Children with IBS identified a greater number (median=4 [25% to 75% quartile=2 to 6]) of perceived symptom-inducing foods than healthy children (median=2 [25% to 75% quartile=0 to 4]; χ(2)=28.6; P<0.001). Children with IBS avoided more foods (median=2 [25% to 75% quartile=1 to 4]) than healthy children (median=0 [25% to 75% quartile=0 to 2.75]; χ(2)=20.8; P<0.001). The number of self-perceived food intolerances was weakly associated (r value range= -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.
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