Table 5.
Intervention effects for studies reporting continuous measures for frequency and quantity of alcohol use
| Frequency of Alcohol Use | Quantity of Alcohol Use | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| k | N |
|
95% CI | Q | df | I 2 | k | N |
|
95% CI | Q | df | I 2 | |
| Weekly drinking | 0 | - | - | - | - | - | - | 3 | 3570 | 0.13* | 0.01-0.25 | 3.98 | 2 | 49.70% |
| Monthly drinking | 2 | 2119 | 0.07 | −0.05-0.20 | 1.76 | 1 | 43.18% | 2 | 4838 | 0.13 | −0.09-0.35 | 1.81 | 1 | 44.69% |
| Lifetime drinking | 2 | 3536 | 0.10 | −0.06-0.27 | 4.25 | 1 | 76.45% | 3 | 2216 | 0.50 | −0.18-1.17 | 88.75*** | 2 | 97.75% |
Note. Random effect model. k = number of studies; N = total number of participants; 
= mean Hedges’g; 95% CI = 95% confidence interval; Q = test of heterogeneity; df = degrees of freedom; I
2 = proportion of observed dispersion. *p < .05 **p < .01 ***p < .001.