Table 3.

Moderator analysis results

	N	Coefficient	SE	t	df	p
Follow-up Assessment Timing	22	.004	.003	1.28	7.71	.238
Age	18	.0001	.019	.006	3.20	.996
% of Female Participants	22	.003	.004	.78	3.63	.481
Single Session (versus multiple sessions)	22	−.21	.18	−1.16	4.78	.299
Treatment Model	22
Motivational Interviewing (Reference)	-	-	-	-	-	-
SBI/SBIRT	-	.34	.27	1.25	3.67	.285
Cognitive Behavioral Therapy	-	.02	.21	.08	3.64	.937
Contingency Management	-	−.43	.27	−1.58	2.07	.250
HIV-related Intervention	-	−.18	.24	−.76	2.95	.503
Country	22
US (Reference)	-	-	-	-	-	-
Russia	-	−.15	.09	−1.79	2.89	.174
China	-	.65	.22	2.94	1.54	.134
Kenya	-	.61	.24	2.51	2.02	.127
Taiwan	-	−.19	.12	−1.53	2.72	.233
Rwanda	-	.09	.25	.34	4.48	.746
Poland	-	−.31	.20	−1.57	2.96	.216
Republic of Georgia	-	−.16	.35	−.46	3.93	.671

Note. N=number of studies with data available for each moderator. Follow-up assessment timing, age ,and % of female participants were mean centered. SE=standard error, df=degrees of freedom, CI=confidence interval.

^*p <.05 when df >= 4, * p <.01 when df < 4