Table 4.

Motivational interviewing (single) (MI-S) versus hepatitis health promotion (HHP)

Outcome or subgroup	Studies	Participants	Statistical method	Effect estimate
4.1 Continuous outcomes			Mean Difference (IV, Fixed, 95% CI)	Subtotals only
4.1.1 Alcohol use as number of standard drinks consumed per day over the last 30 days	1	155	Mean Difference (IV, Fixed, 95% CI)	−0.10 [-1.89, 1.69]
4.1.2 Illicit drug use as frequency of drug use (as measured by Addiction Severity Index - ASI drug)	1	155	Mean Difference (IV, Fixed, 95% CI)	0.00 [-0.03, 0.03]
4.1.3 Illicit drug use as a composite drug score (frequency/severity for all drugs taken)	1	157	Mean Difference(IV, Fixed, 95% CI)	−0.10 [-0.46, 0.26]
4.2 Dichotomous outcomes			Risk Ratio (M-H, Fixed, 95% CI)	Subtotals only
4.2.1 Alcohol use as greater than 50% reduction in number of standard drinks consumed per day over the last 30 days	1	177	Risk Ratio (M-H, Fixed, 95% CI)	0.92 [0.68, 1.26]
4.2.2 Alcohol abstinence as abstinence from alcohol over the last 30 days	1	177	Risk Ratio (M-H, Fixed, 95% CI)	0.97 [0.56, 1.67]