Sensation seeking was based on three items: “Done crazy things even if they are a little dangerous”, “Done something dangerous because someone dared you to do it” and “Done what feels good no matter what” (1 “Never” to 6 “Once a week or more”, alpha=.75). Family structure was constructed from a multiple response item that asked respondents to select all parents/guardians resident in their home. The reference category was both parents residing in the home (n = 615, 74.9%). Due to small numbers, all other custody combinations were coded as ‘other’ (n = 199). Socioeconomic status (SES) was based on an algorithm of mother/father education and income [31].
