Table 1.

Multivariate Omnibus and Single-Moderator Analyses

	k	Intercept	y1	95% CI	p
Percentage Days Abstinent
Omnibus	31	0.143		[0.080, 0.205]	<.001*
Publication Year	31	0.386	−0.022	[−0.040, −0.003]	.021*
Multi-Center Design	31	0.221	−0.110	[−0.276, 0.057]	.197
Placebo Run-In	31	0.159	0.066	[−0.168, 0.299]	.581
Relapse to Heavy Drinking
Omnibus	30	0.247		[0.158, 0.336]	<.001*
Publication Year	30	0.640	−0.037	[−0.013, −0.060]	.002*
Multi-Center Design	30	0.322	−0.120	[−.354, 0.118]	.328
Placebo Run-In	30	0.266	0.035	[−0.293, 0.363]	.834

Note. Publication year was centered at the first publication in this analysis (1992). Multi-Center Design is coded dichotomously where 1 = multi-site and 0 = single-site. Placebo Run-In was coded dichotomously where 0 = No Run-In and 1 = Yes. Multivariate analyses used a mixed model (studies random, levels of moderator variables fixed);

^*p-value < 0.05, k = number of studies, y₁ = slope.