We conducted multi-group analyses with two groups consisting of adolescents who responded "low" vs. "regular" on self-initiated physical activity.
The non-clinical sample consisted of adolescent females (n = 66), with a mean age of 16.5 years (range 15.9-17.7 years).
The target population of the ATLS project consists of adolescent males and females in secondary schools who were free of any physical deformity.
The TEENs of Attica: Genes & Environment TEENAGEE) target population consisted of adolescent students attending all three classes of public secondary schools in the Attica region of Greece.
The present sample consists of adolescent twins who participated in wave 2 of the G1219 study—a longitudinal study of twins and their families.
The clinical sample consisted of adolescent boys with ADHD between 13 and 16 years, where the diagnosis was formulated by an experienced child psychiatrist, then confirmed by an independent child psychiatrist (inclusion criteria).
Furthermore, since our sample only consisted of adolescent boys, with the vast majority being remanded, and with a high prevalence of PDs, it is unknown whether the psychometric properties of the SAPAS-AV found in this study, might be generalised to different settings and populations.
The patient population we aim to investigate consists of adolescents with sexual problems.
The study population consisted of adolescents and youth below 25 years of age attending the youth reproductive health clinic.
However, our study consisted of adolescents who are a special group that needs a lot of psychosocial support.
As the entire cohort in this study consisted of adolescents of mixed ancestry, ethnicity was not added as a covariate in the analysis.
