Table 1.

Demographic characteristics of the selected sample

	Mean (SD)
Age	14.8 (0.34)
	Percentage (n)
Gender
Male	50.7 (172)
Female	49.3 (167)
Family composition
Father-mother	29.2 (99)
Single parent	46.6 (158)
Parent-stepfather/stepmother or relative	22.4 (76)
Interviewed but did not report family status	1.8 (6)
Measure completion
Participants who complete measures in 9th grade	100 (404)
Participants who complete measures in 10th grade	91.1 (368)
Participants who complete measures in 10th grade	83.9 (339)
Moved to a different school	7.1 (24)