RT Journal Article
SR Electronic
T1 Transform-Us! cluster RCT: 18-month and 30-month effects on children’s physical activity, sedentary time and cardiometabolic risk markers
JF British Journal of Sports Medicine
JO Br J Sports Med
FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine
SP 311
OP 319
DO 10.1136/bjsports-2022-105825
VO 57
IS 5
A1 Jo Salmon
A1 Lauren Arundell
A1 Ester Cerin
A1 Nicola Dawn Ridgers
A1 Kylie D Hesketh
A1 Robin M Daly
A1 David Dunstan
A1 Helen Brown
A1 Jacqui Della Gatta
A1 Paul Della Gatta
A1 Mai J M Chinapaw
A1 Lauren Shepphard
A1 Marj Moodie
A1 Clare Hume
A1 Vicki Brown
A1 Kylie Ball
A1 David Crawford
YR 2023
UL http://bjsm.bmj.com/content/57/5/311.abstract
AB Objective To test the efficacy of the Transform-Us! school- and home-based intervention on children’s physical activity (PA), sedentary behaviour (SB) and cardiometabolic risk factor profiles.Methods A 30-month 2×2 factorial design cluster randomised controlled trial delivered in 20 primary schools (148 Year 3 classes) in Melbourne, Australia (2010–2012), that used pedagogical and environmental strategies to reduce and break up SB, promote PA or a combined approach, compared with usual practice. Primary outcomes (accelerometry data; n=348) were assessed at baseline, 18 and 30 months. Secondary outcomes included body mass index (BMI) and waist circumference (WC) (n=564), blood pressure (BP) (n=537) and biomarkers (minimum n=206). Generalised linear mixed models estimated the interactive effects of the PA and SB interventions on the outcomes. If there was no interaction, the main effects were assessed.Results At 18 months, there were intervention effects on children’s weekday SB (−27 min, 95% CI: −47.3 to −5.3) for the PA intervention, and on children’s average day PA (5.5 min, 95% CI: 0.1 to 10.8) for the SB intervention. At 30 months, there was an intervention effect for children’s average day SB (−33.3 min, 95% CI: −50.6 and −16.0) for the SB intervention. Children’s BMI (PA and SB groups) and systolic BP (combined group) were lower, and diastolic BP (PA group) was higher. There were positive effects on WC at both time points (SB intervention) and mixed effects on blood parameters.Conclusions The Transform-Us! PA and SB interventions show promise as a pragmatic approach for reducing children’s SB and adiposity indicators; but achieving substantial increases in PA remains challenging.Trial registration ISRCTN83725066; ACTRN12609000715279.Data are available upon reasonable request.