Table 2 Subgroup analysis results
Subgroup | No. of trials | Standard mean difference (95% CI) | P value | I2 (%) | Test of interaction, P |
|---|---|---|---|---|---|
Total | 9 | 0.59 (0.25, 0.93) | 0.001 | 81.9 | |
Training duration | |||||
≤ 3 months | 3 | 0.71 (0.41, 1.01) | 0.000 | 69.3 | 0.106 |
> 3 months | 3 | 0.57 (0.41, 0.72) | 0.000 | 88.2 | |
Risk of bias | |||||
Low | 3 | 0.70 (0.47, 0.94) | 0.000 | 0.0 | 0.028 |
Unclear/high | 3 | 0.54 (0.38, 0.71) | 0.000 | 88.4 | |
Frequency of training | |||||
≤ 3 days a week | 7 | 0.52 (0.37, 0.68) | 0.000 | 82.4 | 0.002 |
> 3 days a week | 2 | 0.86 (0.57, 1.16) | 0.000 | 83.5 | |
Follow-up | |||||
< 6 months | 5 | 0.78 (0.54,1.01) | 0.000 | 57.8 | 0.105 |
≥ 6 months | 1 | 0.50 (0.33,0.67) | 0.000 | 88.1 | |