title: A SYSTEMATIC REVIEW AND META-ANALYSIS OF DROPOUT RATES IN YOUTH SOCCER.
abstract: Despite the many benefits of involvement in youth sports, participation in them declines throughout childhood and adolescence. The present study performed a systematic review and meta-analysis of 12 studies reporting dropout rates in youth soccer, involving a total of 724,036 youths ages 10-18 years from five countries. The mixed effects meta-regression analyses took into account age and sex as statistical moderators of dropout rate. Potential articles were identified through computerized searches of the databases PubMed, MedLine, Embase, and SportDiscus up until August 2014, without any further time limit. Based on results reported in the 10 included articles, the annual weighted mean dropout rate is 23.9% across the included cohorts. Meta-regression indicated that annual dropout rates are stable from the ages of 10-19 years, with higher rates for girls (26.8%) compared to boys (21.4%). The present study suggests that youth soccer players are prone to dropout rates in which close to one-fourth of players leave the sport annually, which appears to be a consistent finding across ages 10-18 years.
authors.affiliation: 1 Physiotherapy Programme, Sør-Trøndelag University College.
authors.forename: Nina Elise
authors.initials: NE
authors.lastname: Møllerløkken
authors.affiliation: 1 Physiotherapy Programme, Sør-Trøndelag University College.
authors.forename: Håvard
authors.initials: H
authors.lastname: Lorås
authors.affiliation: 1 Physiotherapy Programme, Sør-Trøndelag University College.
authors.forename: Arve Vorland
authors.initials: AV
authors.lastname: Pedersen
mesh_terms: D000293:Adolescent; D000367:Age Factors; D056352:Athletes / Q000706:statistics & numerical data*; D002648:Child; D003431:Cross-Cultural Comparison; D005260:Female; D005602:France; D006801:Humans; D008297:Male; D009664:Norway; D011174:Portugal; D012737:Sex Factors; D012916:Soccer / Q000706:statistics & numerical data*; D013030:Spain; D014481:United States