
Studies reporting continuous measures

Studies reporting categorical measures


k

$\overline{\mathbf{g}}$

95% CI

Q

df

I
^{2}

Total between Q

k

$\overline{\mathit{OR}}$

95% CI

Q

df

I
^{2}

Total between Q


School level:
      
0.80
      
0.00

Junior high school

7

0.12***

0.050.19

14.41*

6

58.42%
 
8

0.91

0.771.07

25.24***

7

72.26%
 
High school

4

0.35

− 0.150.85

143.91***

3

92.92%
 
4

0.91

0.801.03

2.93

3

0.00%
 
Program intensity:
      
0.07
      
0.09

Medium (6 to 10 hours)

7

0.23

− 0.000.46

180.11***

6

96.67%
 
3

0.90

0.761.07

0.47

2

0.00%
 
High (11 to >15 hours)

3

0.20***

0.130.26

1.34

2

0.00%
 
12

0.93

0.821.06

36.16***

11

69.58%
 
 Note. Mixed effect analysis. k = number of studies; $\overline{g}$ = mean Hedges’g; $\overline{\mathit{OR}}$ = mean Odds Ratio; 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.