
Frequency of Alcohol Use

Quantity of Alcohol Use



k

N

$\overline{\mathit{g}}$

95% CI

Q

df

I
^{2}

k

N

$\overline{\mathit{g}}$

95% CI

Q

df

I
^{2}


Weekly drinking

0













3

3570

0.13*

0.010.25

3.98

2

49.70%

Monthly drinking

2

2119

0.07

−0.050.20

1.76

1

43.18%

2

4838

0.13

−0.090.35

1.81

1

44.69%

Lifetime drinking

2

3536

0.10

−0.060.27

4.25

1

76.45%

3

2216

0.50

−0.181.17

88.75***

2

97.75%

 Note. Random effect model. k = number of studies; N = total number of participants; $\overline{g}$ = 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.