Table 2. Subsample analyses.
| Distinction | Type | Number of estimates | Pooled RE effect | 95% CI lower bound | 95% CI upper bound | Tau |
|---|---|---|---|---|---|---|
| Measure | Ecological | 20 | 1.38 | 1.05 | 1.80 | 0.53 |
| Individual | 26 | 1.45 | 1.20 | 1.76 | 0.41 | |
| Period | 1918 | 7 | 1.42 | 1.10 | 1.83 | 0.30 |
| 2009 | 39 | 1.44 | 1.20 | 1.76 | 0.50 | |
| Method | Relative Risk | 10 | 1.61 | 1.26 | 2.06 | 0.35 |
| Odds Ratio | 36 | 1.39 | 1.14 | 1.69 | 0.49 |
The plot shows point estimates and 95% confidence intervals for different subsamples of studies, with a grey circle indicating the number of studies in each subsample.