In order to capture the development through adolescence and into EA, all participants aged 15 at Wave 1 were included in this study (N = 3676; 51% female). Therefore, adolescents who were either younger or older than 15 at Wave 1 were not included in the analyses. Thus, the mean age (in years) of participants at Wave 1, Wave 2, Wave 3, and Wave 4 was 15.0 (SD = 0.00), 15.9 (SD = 0.33), 21.4 (SD = 0.50), 27.9 (SD = 0.48), respectively.