Children with Hirschsprung's Disease Report Dietary Effects on Gastrointestinal Complaints More Frequently than Controls.

Hirschspung's disease (HD) is a congenital gastrointestinal (GI) disorder frequently accompanied by GI complaints. Despite the lack of evidence regarding whether diet affects GI symptoms, advice on dietary changes is common. The aim was to investigate self-reported dietary effects on GI symptoms, comparing children with HD with healthy children. This was an observational, cross-sectional, self-reported case-control study using the validated Diet and Bowel Function questionnaire. All children with HD aged 1-18 years were surgically treated during 2003-2021 at a national HD center, and their parents were invited to participate. Healthy children served as controls. The data were presented as median (range) and (%). 71/85 children with HD (6 years (1-17); 76% boys) and 265/300 controls (9 years (1-18); 52% boys) participated. Dietary effects on GI symptoms were reported more frequently by children with HD than controls (55/71 [77%] vs. 137/265 [52%], ≤ 0.001), as were dietary adjustments to improve GI symptoms (49/71 [69%] vs. 84/265 [32%], ≤ 0.001), and social limitations due to dietary adjustments (20/48 [42%] vs. 22/121 [18%], = 0.002). Of 90 food items, children with HD reported that more of the items induced GI symptoms compared to controls (7 (0-66) vs. 2 (0-34), = 0.001). Diet-induced GI symptoms and dietary adjustments' impact on daily life are reported more frequently by children with HD than controls. Moreover, the number and types of food items causing GI symptoms differ. The results indicate the need for disease-specific dietary advice to improve support for families of children with HD.