Table 3.

Meta‐regression using quality level as a moderator

Superordinate factor	n	Point estimate	Confidence interval	Z‐value	P‐value
Alcohol consumption	15	0.04	−0.06, 0.15	0.83	0.41
Drinking problems	14	0.01	−0.05, 0.07	0.37	0.71
Negative affect	8	−0.04	−0.07, –0.01	−3.06	< 0.001
Negative reinforcement	11	0.02	−0.09, 0.14	0.38	0.70
Positive reinforcement	8	0.03	−0.07, 0.12	0.57	0.57