The role of a positive family history in pediatric in ammatory bowel disease (IBD) in the era of biologic therapy has not been elucidated. We retrospectively reviewed the medical records of children with IBD and retrieved demographic and clinical characteristics, including the presence of a positive family history of IBD, IBD phenotype, disease course, and therapy. Overall, 325 children (age range at diagnosis 11-15 years) were included, of whom 82 (25.2%) had a positive family history. Children diagnosed during 2016-2020 had a higher frequency of positive family history compared to those diagnosed during 2010-2015 (31.8% versus 20.7%, respectively, p = 0.024). Children with a positive family history had a higher risk for a stricturing phenotype than those with a negative family history (11.3% versus 2.8%, respectively, p = 0.052). They more often received nutritional therapy (53.7% versus 36.6%, p = 0.007) and less often received corticosteroids (36.6% versus 52.7%, p = 0.012). More children with a negative family history needed intensi cation of biologic therapy (p = 0.041). Conclusion:The rate of a positive family history of IBD in the pediatric IBD population is increasing. A positive family history may have some impact upon IBD phenotype but none on IBD outcome.

The role of a positive family history in pediatric inflammatory bowel disease (IBD) in the era of biologic therapy has not been elucidated. We retrospectively reviewed the medical records of children with IBD and retrieved demographic and clinical characteristics, including the presence of a positive family history of IBD, IBD phenotype, disease course, and therapy. Overall, 325 children (age range at diagnosis 11-15 years) were included, of whom 82 (25.2%) had a positive family history. Children diagnosed during 2016-2020 had a higher frequency of positive family history compared to those diagnosed during 2010-2015 (31.8% versus 20.7%, respectively, p = 0.024). Children with a positive family history had a higher risk for a stricturing phenotype than those with a negative family history (11.3% versus 2.8%, respectively, p = 0.052). They more often received nutritional therapy (53.7% versus 36.6%, p = 0.007) and less often received corticosteroids (36.6% versus 52.7%, p = 0.012). More children with a negative family history needed intensification of biologic therapy (p = 0.041). Conclusion: The rate of a positive family history of IBD in the pediatric IBD population is increasing. A positive family history may have some impact upon IBD phenotype but none on IBD outcome.

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Background Previous studies have suggested that adult patients with inflammatory bowel disease (IBD) that have a positive family history of IBD may be at risk for a more aggressive clinical course, compared with sporadic cases. The role of a positive family history in paediatric IBD, however, has not been elucidated. Methods We retrospectively reviewed the medical records of children with IBD and retrieved demographic and clinical characteristics, including IBD phenotype, course and therapy. We have documented the presence of a positive family history of IBD, and compared the clinical data of children with a positive family history to that of children with a negative family history. Results Overall, 325 children with a median (IQR) age of 13.9 (11–15) years at diagnosis were included: 194 (59.7%) with Crohn’s disease (CD) and 131 (40.3%) with ulcerative colitis. A positive family history of IBD was observed in 82 children (25.2%). Of them, 36 (43.9%) had a first-degree family member with IBD, and 23 (28%) had more than one family member with IBD. Children with a positive family history had a higher risk for stricturing phenotype (11.3% versus 2.8%, P=0.05) and were treated more often by nutritional therapy (53.7% versus 36.6%, P=0.007) and less by corticosteroids (36.6% versus 52.7%, P=0.012). Children with a negative family history had a higher need to intensification of biologic therapy [Hazard ratio (HR)=1.792, 95% confidence interval (CI) 1.005–3.195, P=0.041 and HR=2.597, 95% CI 1.224–5.525, P=0.008 for CD) (Figure 1). No difference in the risk for IBD exacerbation, hospitalization and operation was found between the groups. Conclusion A positive family history of IBD may have a mild impact on the phenotype and course of paediatric IBD.