Abstract 16408: Objectively-Measured Physical Activity Does Not Differ by Disease Severity in Children With Congenital Heart Disease
Introduction: There are conflicting reports on the physical activity levels in children with congenital heart disease (CHD) according to disease severity. Few studies have objectively measured physical activity in children across the CHD spectrum.
Hypothesis: We hypothesised that physical activity would be significantly lower in children with more severe CHD compared with mild CHD.
Methods: We recruited patients with CHD, aged 9-19 yrs, from pediatric cardiology clinics throughout British Columbia, Canada. Patients were fitted with an accelerometer (GT3X+ or GT9XLink; ActiGraph LLC; 60s epoch) to be worn over the right hip for 7days. We included accelerometry files if they had ≥3days with ≥600min/day wear time. We estimated daily means for: total physical activity (axis1 counts/day), moderate-to-vigorous physical activity (MVPA; min/day), vigorous physical activity (min/day), and %sedentary time (%/day). We classified CHD as mild, moderate, severe (Bethesda), or cardiac transplant (Tx). We used multiple linear regression to assess the association between physical activity metrics, disease complexity and relevant patient characteristics.
Results: We included 82 patients (13.6±2.7yrs; 54% male), of which 21 had mild CHD, 26 moderate CHD, 26 severe CHD and 9 Tx. Overall, median daily mins of MVPA was 31 min/day (interquartile range: 18.3-43.6 min) and 17% met physical activity guidelines of 60 min of MVPA/day. There were no significant differences in any physical activity metric according to CHD disease complexity. In multiple linear regression analyses (adjusted for BMI z-score), age was positively related to sedentariness (p<0.001), and inversely related to total physical activity and MVPA (both p<0.01). Boys were less sedentary (p<0.05) and more active than girls (total and MVPA; both p<0.05). Neither age nor sex was related to vigorous physical activity.
Conclusions: In conclusion, we found no difference in physical activity patterns based on CHD disease severity. We observed age- and sex-related patterns in physical activity as expected for healthy children, suggesting that socio-cultural determinants are also at play.
Author Disclosures: S.L. Duncombe: None. C. Voss: None. P.H. Dean: None. A.M. De Souza: None. R. Gardner: None. K.C. Harris: None.
- © 2016 by American Heart Association, Inc.