Table 1. Sample Descriptives for Substance Use, Healthy Leisure, and Leisure Planning Efficacy.

Variable	Grade 8		Grade 9		Grade 10		Grade 11
	Beg. n=2.249	End n=2.148	Beg. n=2.106	End n=2.005	Beg. n=1.757	End n=1.155	Beg. n=594	End n=453
Substance Use Composite	1.52 (2.36)	2.24 (2.91)	2.83 (3.32)	3.70 (3.74)	4.18 (3.86)	4.34 (3.85)	4.75 (3.88)	4.43 (3.78)
Healthy Leisure	2.86 (0.81)	2.86 (0.79)	2.82 (0.82)	2.82 (0.78)	2.78 (0.80)	2.79 (0.78)	2.87 (0.73)	2.79 (0.76)
Leisure Planning Efficacy	2.84 (0.79)	2.80 (0.79)	2.79 (0.83)	2.82 (0.80)	2.79 (0.80)	2.74 (0.81)	2.86 (0.78)	2.82 (0.76)

Note: Sample means and (standard deviations). Measures were collected at the beginning and end of Grades 8 through 11 occurring in October and March respectively. Substance Use composite ranged from 0-20. Leisure factors ranged from 0 (strongly disagree) to 4 (strongly agree).