Measure of effect | No. included reviews | Percent included reviews1 |
---|---|---|
Comparative measures (between interventions) | ||
Odds ratio | 55 | 33.1 |
Relative risk | 51 | 30.7 |
Risk difference | 8 | 4.8 |
Mean difference | 6 | 3.6 |
Standardised mean difference | 7 | 4.2 |
Percent difference | 2 | 1.2 |
Non-comparative measures | ||
Correlation | 2 | 1.2 |
Probability (or percent) | 13 | 7.8 |
Mean difference | 2 | 1.2 |
Percent difference | 3 | 1.8 |
Multiple measures | ||
More than one | 16 | 9.6 |
Other measures | ||
Other | 1 | 0.6 |