Table 2.

Measures not common to the other Center for Analysis of Pathways from Childhood to Adulthood (CAPCA) studies included in this supplement, by age and domain.

Domain
Parental relations	Participate in decision making at ages 12 (α = 0.61) and 18 (α = 0.58), 2 items: e.g. ‘How often do you take part in making family decisions that concern yourself?’ (1 = never, 4 = always)
Social relations	Social ability at age 12, 4 items: e.g. ‘I can make friends if I really work at it’ (1 = not at all true; 7 = very true), α = 0.76
	At age 18,1 item: ‘How good are you at making friends?’ (1 = not at all good, 7 = very good)
	Importance of making friends at age 12 and 18, 1 item: ‘For me making friends is...’ (1 = not important, 7 = very important)
	Time spent with friends at age 12, 1 item: ‘Outside school, how much time do you spend with your friends?’ (1 = 3 hours or more, 7 = rarely)
	At age 18, 1 item: ‘Outside school, how many hours do you spend with your friends each week?’ (1 = 0-8 = 21 or more)
	Importance of popularity at ages 12 (α = 0.84) and 18 (α = 0.67), 2 items: e.g. ‘For me being popular is...’ (1 = not important at all, 7 = very important)
	Peer focus at age 18, 4 items: e.g. ‘Would you get lower grade to be popular with friends?’ (1 = never, 7 = always), α = 0.68
	Social efficacy at age 18, a composite of social ability and difficulty making friends (reverse-coded), α = 0.82
Externalizing	Other problem behavior (i.e. not specific to aggressive behavior or bringing alcohol to school) at age 12, 4 items: e.g. ‘In the last three weeks at school, about how many times did you... write or draw anything on school property when you were not supposed to?’ (0 = never, 12 = 12 or more), α = 0.75
Other	Sport value at ages 12 (α = 0.76) and 18 (α = 0.87), 2 items: e.g. ‘How much do you like playing sports?’ (1 = a little, 7 = a lot)
	Sport activity at age 12, 1 item: i.e. ‘How much time do you spend on sports?’ (1 = less than 15 minutes a day 4 = 1 hour or more a day)
	At age 18,2 items: e.g. ‘In the last 6 months, how many hours did you spend each week on... taking part in an organized sport?’ (1 = less than 15 minutes a day, 4 = 1 hour or more a day), α = 0.72

α, coefficient alpha.