Table 9. Heterogeneity measure.
| Measure | Estimate | Lower bound | Upper bound |
| tau^2 | 2.4987 | 0 | 51.7919 |
| tau | 1.5807 | 0 | 7.1967 |
| I^2(%) | 65.7314 | 0 | 97.5465 |
| H^2 | 2.9181 | 1 | 40.7582 |
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