Late start of upper secondary education and health-compromising behaviours among Finnish adolescents—a follow-up study

Background The Finnish government has emphasized the need to expedite educational transitions. We study if a late start of upper secondary education is related to health-related selection, namely health-compromising behaviours in adolescence. Methods A large cohort of adolescents from the seventh (12–13 years) and ninth (15–16 years) grades answered online classroom surveys (total n = 10 873). They were followed to the start of upper secondary...