Growth in children receiving contemporary disease specific therapy for Crohn's disease

Introduction It is unclear whether recent therapeutic advances have improved the growth of children with Crohn's disease (CD). Aim To assess the frequency of short stature and poor growth and their relationship to disease course and therapy in children with CD. Methods The anthropometric and treatment details of 116 children (68 male) with a mean (range) age at diagnosis of 10.8 years (4.9-15.5) and a mean age at maximum follow-up (MF) of 15.4 years (9.4-19.3) were studied retrospectively at diagnosis (T0), at 1 (T1), 2 (T2) and 3 years (T3) after diagnosis and at MF. Results At T0, mean height SD score (HtSDS) was -0.5 (-3.3 to 2.6) compared to a mid-parental HtSDS of 0.2 (-2.0 to 01.4) (p=0.002). At T1, T2, T3 and MF, mean HtSDS was -0.6 (-4.8 to 7.8), -0.6 (-2.9 to 2.2), -0.7 (-3.6 to 2.5) and -0.5 (-3.5 to 2.9), respectively. Mean Ht velocity (HV) SDS at T1, T2, T3 and MF was -1.4 (-7.4 to 7.4), -0.6 (-7.5 to 6.1), -0.1 (-6.6 to 7.6) and 0.6 (-4.8 to 7.8), respectively (p<0.05). In final models, HtSDS was associated negatively with the use of prednisolone (p=0.0001), azathioprine (p=0.0001), methotrexate (p=0.0001) and weight SDS (WtSDS) (p=0.0001). HVSDS was associated positively with age (p=0.0001) and WtSDS (p=0.01). Delta HtSDS was associated negatively with use of prednisolone (p<0.02). Conclusion Although current therapy for CD is associated with improved rate of growth for the first few years, a substantial proportion of children remain short. This study also highlights the need for consistency in describing growth in children with chronic diseases.