Table 3 Ratio of odds ratio between large and small trials stratified by characteristics of meta-analyses.
Comparison | No. of meta-analyses | No. of trials | Ratio of odds ratio (95% CI) | Heterogeneity (I2) |
|---|---|---|---|---|
Overall | 27 | 317 | 0.60 (0.53-0.68) | 50.3% |
Significance of effect size | Â | Â | Â | Â |
Significant | 8 | 99 | 0.49 (0.38-0.60) | 62.9% |
Non-significant | 19 | 218 | 0.69 (0.59-0.79) | 28.8% |
Heterogeneity | Â | Â | Â | Â |
Low | 19 | 220 | 0.79 (0.68-0.90) | 0% |
High | 8 | 97 | 0.46 (0.36-0.55) | 57.2% |