Table 4.

Effect of the game on drug use.

Follow-up survey/measure		Drug use values imputed			Complete cases
		Intervention (N=36), n (%)	Control (N=44), n (%)	Unadjusted risk ratio (95% CI)	Intervention (N=24), n (%)	Control (N=27), n (%)	Unadjusted risk ratio (95% CI)
At 4-week follow-up
	Not used in the past 7 days	22 (61.1)	19 (43.2)	1.4 (0.9-2.2)	22 (91.7)	19 (70.4)	1.3 (1.0-1.7)
	Not used in the past 30 days	18 (50.0)	17 (38.6)	1.3 (0.8-2.1)	18 (75.0)	17 (63.0)	1.2 (0.8-1.7)
At 8-week follow-up
	Not used in the past 7 days	16 (44.4)	19 (43.2)	1.0 (0.6-1.7)	16 (66.7)	19 (76.0)	0.9 (0.6-1.3)
	Not used in the past 30 days	15 (41.7)	16 (36.4)	1.2 (0.7-2.0)	15 (62.5)	16 (64.0)	1.0 (0.6-1.5)