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Circannual growth in Wisconsin children and adolescents: Identifying optimal periods of obesity prevention
Author(s) -
VanWormer Jeffrey J.,
Kieke Burney A.,
Hanrahan Lawrence P.,
Pomeroy Jeremy J.,
Mundy Alex,
Schoeller Dale A.
Publication year - 2020
Publication title -
pediatric obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.226
H-Index - 69
eISSN - 2047-6310
pISSN - 2047-6302
DOI - 10.1111/ijpo.12572
Subject(s) - medicine , overweight , body mass index , demography , obesity , observational study , psychological intervention , weight gain , weight management , gerontology , pediatrics , body weight , psychiatry , sociology
Summary Background Recent studies suggest kids tend to gain the most weight in summer, but schools are chastised for supporting obesogenic environments. Conclusions on circannual weight gain are hampered by infrequent body mass index (BMI) measurements, and guidance is limited on the optimal timeframe for paediatric weight interventions. Objectives This study characterized circannual trends in BMI in Wisconsin children and adolescents and identified sociodemographic differences in excess weight gain. Methods An observational study was used to pool data from 2010 to 2015 to examine circannual BMI z‐score trends for Marshfield Clinic patients age 3 to 17 years. Daily 0.20, 0.50, and 0.80 quantiles of BMI z‐score were estimated, stratified by gender, race, and age. Results BMI z‐scores increased July to September, followed by a decrease in October to December, and another increase to decrease cycle beginning in February. For adolescents, the summer increase in BMI was greater among those in the upper BMI z‐score quantile relative to those in the lower quantile (+0.15 units vs +0.04 units). This pattern was opposite in children. Conclusions BMI increased most rapidly in late summer. This growth persisted through autumn in adolescents who were larger, suggesting weight management support may be beneficial for kids who are overweight at the start of the school year.