Table 2.

Logistic regression: Odds ratio for staying in the lowest scale tertile at age 17 if in lowest tertile at age 13, compared to middle and upper tertile at age 13

	Boys	Girls
	OR (95 % CI)	OR (95 % CI)
Family Support	6.9 (2.6, 18.3)	3.7 (1.4, 9.4)
Friend Support	13.8 (4.8, 40.2)	3.7 (1.4, 9.7)

Note. Variables dichotomized as 1 = lowest tertile of scale and 0 = middle/upper tertiles combined

Note. OR odds ratio, CI confidence interval

Note. Mean for lowest tertile for boys’ Family Support at age 17 was 1.19 and mean for Friend Support was 1.50. Mean for lowest tertile for girls’ Family Support at age 17 was 1.15 and mean for Friend Support was 1.28