Reference | Treatment | Control | Weight | Weighted Mean Difference | ||
---|---|---|---|---|---|---|
n | Mean ± S.D. | n | Mean ± S.D. | |||
% | 95% CI | |||||
Apfelbaum et al. (1999) | 81 | -5.20 ± 7.50 | 78 | 0.50 ± 5.70 | 17.14 | -5.70 (-7.77 to -3.63) |
McMahon et al. (2000) | 142 | -4.40 ± 7.16 | 69 | -0.50 ± 6.06 | 21.32 | -3.90 (-5.75 to -2.05) |
Smith and Goulder (2001) | 154 | -4.40 ± 7.16 | 157 | -1.60 ± 6.37 | 32.20 | -2.80 (-4.31 to -1.29) |
Smith and Goulder (2001) | 153 | -6.40 ± 7.73 | 157 | -1.60 ± 6.37 | 29.34 | -4.32 (-6.38 to -3.22) |