Abstract
To examine long-term participation and dropout rates in Australian youth swimming using survival analyses and to determine whether multiple individual, socio-demographic, and competition-related factors influenced dropout. Retrospective cohort study of registration and competitive performance data. Part 1-Registration data from N=17161 female (n=9400) and male (n=7761) New South Wales (NSW) swimmers aged 10-15years (inclusive). Part 2-Competition level involvement in a subsample of female (n=1011) and male (n=811) swimmers, aged 12-15years, was also examined. To determine dropout rates and influential factors, Kaplan-Meier survival analyses supplemented by Cox regression were used. (1) Kaplan-Meier analyses identified median sustained participation rates of four years (95% CI=3.93-4.06), with 15.9% maintaining participation over 10years. Cox regressions identified age-group was associated with dropout (P<.001), with a 184.9% higher Hazard Rate (HR) for 10- vs 15-year-olds. Residential proximity to major cities was associated with dropout (P<.001), with urban swimmers reporting a 24.8% higher HR rate than rural swimmers. Sex and relative age were not associated with dropout. (2) The subsample median sustained participation was five years (95% CI=4.79-5.20), with 25.3% maintaining participation for ten years. Level of competition was associated (P<.001), with an 86% higher HR when considering lower competition levels (ie, club/district v national). In a large representative sample of swimmers, survival analyses identified age-group, competition level, and city proximity were associated with increased swimming dropout rates.
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