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- Title
Frequency of school‐based intervention needed to improve weight outcomes of Mexican‐American adolescents with overweight or obesity: a randomized controlled trial.
- Authors
Arlinghaus, Katherine R.; O'Connor, Daniel P.; Johnston, Craig A.
- Abstract
Summary: Background: Efficacious school‐based interventions among ethnic minority youth are often intensive and difficult to disseminate. Objective: This parallel, open‐label‐randomized controlled trial aimed to compare changes in adolescent‐standardized body mass index (zBMI) from a school‐based obesity intervention given 0, 1, 3, or 5 days a week. Methods: Mexican‐American youth (n = 243) with overweight or obesity were recruited from a Houston school district and randomized to receive an obesity intervention with established efficacy 0 (control), 1, 3, or 5 d/wk (respectively, equating to 0, 40, 120, or 200 min of contact each week). In each condition, 80% of intervention time was allocated to physical activity and 20% to nutrition, with behavioural modification overlaid throughout. zBMI was calculated from directly measured height and weight. A linear mixed model evaluated differences in zBMI over time between conditions. Results: Participants were 12.02 ± 0.57 years old with a zBMI of 1.80 ± 0.46 at baseline. Among those with complete data at 1 year (n = 203), a significant condition by time interaction was indicated (F = 9.42, P <.001). Those who received the intervention 3 or 5 d/wk had significantly greater decreases in zBMI than control (respectively, −0.19 zBMI units/y; 95% CI, −0.28 to −0.11; and −0.18 zBMI units/y; 95% CI, −0.27 to −0.10, both P <.001). No differences were found between 3 and 5 d/wk (95% CI, −0.09‐0.08, P =.87). Conclusions: The intervention provided 3 d/wk resulted in similar zBMI improvements as the intervention provided 5 d/wk. This information can be used to develop scalable school‐based obesity interventions.
- Subjects
TREATMENT of childhood obesity; CONFIDENCE intervals; HISPANIC Americans; NUTRITIONAL assessment; STATURE; STUDENT health; BODY mass index; RANDOMIZED controlled trials; PHYSICAL activity
- Publication
Pediatric Obesity, 2019, Vol 14, Issue 12, pN.PAG
- ISSN
2047-6302
- Publication type
Article
- DOI
10.1111/ijpo.12568