Effectiveness and cost-effectiveness of the PLAN-A intervention, a peer led physical activity program for adolescent girls: results of a cluster randomised controlled trial

International Journal of Behavioral Nutrition and Physical Activity

Ruth R Kipping¹  Rona Campbell¹  Emily Sanderson²  William Hollingworth²  Rebecca Kandiyali²  Stephanie J MacNeill²  Tom Reid³  Byron Tibbitts³  Simon J. Sebire³  Kathryn Willis³  Russell Jago⁴ 

[1] Bristol Medical School: Population Health Sciences, University of Bristol, Bristol, UK;Bristol Trials Centre, Bristol Randomised Trials Collaboration, University of Bristol, Bristol, UK;Bristol Medical School: Population Health Sciences, University of Bristol, Bristol, UK;Centre for Exercise, Nutrition & Health Sciences, School for Policy Studies, University of Bristol, 8 Priory Road, BS8 1TZ, Bristol, UK;Centre for Exercise, Nutrition & Health Sciences, School for Policy Studies, University of Bristol, 8 Priory Road, BS8 1TZ, Bristol, UK;The National Institute for Health Research Applied Research Collaboration West (NIHR ARC West) at University Hospitals Bristol NHS Foundation Trust, Bristol, UK;

关键词: Physical activity;    Peers;    Adolescent girls;    Intervention;    School;   

DOI  :  10.1186/s12966-021-01133-8

来源: Springer

【 摘 要 】

BackgroundPhysical activity is associated with improved health. Girls are less active than boys. Pilot work showed that a peer-led physical activity intervention called PLAN-A was a promising method of increasing physical activity in secondary school age girls. This study examined the effectiveness and cost-effectiveness of the PLAN-A intervention.MethodsWe conducted a cluster randomised controlled trial with Year 9 (13–14 year old) girls recruited from 20 secondary schools. Schools were randomly assigned to the PLAN-A intervention or a non-intervention control group after baseline data collection. Girls nominated students to be peer leaders. The top 18 % of girls nominated by their peers in intervention schools received three days of training designed to prepare them to support physical activity. Data were collected at two time points, baseline (T0) and 5–6 months post-intervention (T1). Participants wore an accelerometer for seven days to assess the primary outcome of mean weekday minutes of moderate-to-vigorous physical activity (MVPA). Multivariable mixed effects linear regression was used to estimate differences in the primary outcome between the two arms on an Intention-to-Treat (ITT) basis. Resource use and quality of life were measured and a within trial economic evaluation from a public sector perspective was conducted.ResultsA total of 1558 girls were recruited to the study. At T0, girls in both arms engaged in an average of 51 min of MVPA per weekday. The adjusted mean difference in weekday MVPA at T1 was − 2.84 min per day (95 % CI = -5.94 to 0.25) indicating a slightly larger decline in weekday MVPA in the intervention group. Results were broadly consistent when repeated using a multiple imputation approach and for pre-specified secondary outcomes and sub-groups. The mean cost of the PLAN-A intervention was £2817 per school, equivalent to £31 per girl. Economic analyses indicated that PLAN-A did not lead to demonstrable cost-effectiveness in terms of cost per unit change in QALY.ConclusionsThis study has shown that the PLAN-A intervention did not result in higher levels of weekday MVPA or associated secondary outcomes among Year 9 girls. The PLAN-A intervention should not be disseminated as a public health strategy.Trial registrationISRCTN14539759–31 May, 2018.

【 授权许可】

CC BY