Table 2.
Meta-analyses of cognition
| k | OR | 95% CI | P | t | 95% PI | I2 | 95% CI | ||
|---|---|---|---|---|---|---|---|---|---|
| All factors | Random effects model | 28 | 1.2006 | (1.0127, 1.4234) | 0.0363 | 2.2 | (0.5912, 2.4382) | 92.1% | (89.8%, 94.0%) |
| Outliers removed | 24 | 1.2651 | (1.1443, 1.3987) | <0.0001 | 4.85 | (1.0272, 1.5582) | 16.9% | (0.0%, 49.4%) | |
| Demographics | Random effects model | 15 | 1.5098 | (1.1905, 1.9147) | 0.0023 | 3.72 | (0.7144, 3.1909) | 89.2% | (83.9%, 92.8%) |
| Outliers removed | 13 | 1.7386 | (1.3997, 2.1595) | <0.0001 | 5.56 | (1.0247, 2.9496) | 48.2% | (1.7%, 72.7%) | |
| Health | Random effects model | 16 | 1.2856 | (1.0136, 1.6305) | 0.0397 | 2.25 | (0.5822, 2.8385) | 80.1% | (68.4%, 87.4%) |
| Outliers removed | 13 | 1.2259 | (1.0601, 1.4175) | <0.0001 | 3.05 | (0.8819, 1.7040) | 70.4% | (47.9%, 83.2%) | |
| Mental health | Random effects model | 10 | 1.6803 | (1.1848, 2.3830) | 0.0084 | 3.36 | (0.6409, 4.4051) | 84.9% | (73.9%, 91.2%) |
| Outliers removed | 9 | 1.8175 | (1.2699, 2.6012) | 0.0049 | 3.84 | (0.7416, 4.4543) | 61.2% | (19.6%, 81.3%) | |
| Lifestyle | Random effects model | 13 | 1.04 | (0.7765, 1.3930) | 0.7747 | 0.29 | (0.3836, 2.8197) | 93.4% | (90.4%, 95.4%) |
| Outliers removed | 10 | 0.9623 | (0.7490, 1.2363) | 0.7364 | −0.35 | (0.4841, 1.9129) | 83.4% | (70.9%, 90.5%) | |
| SDH | Random effects model | 15 | 0.9994 | (0.6110, 1.6348) | 0.998 | 0 | (0.1656, 6.0331) | 98.2% | (97.8%, 98.6%) |
| Outliers removed | 13 | 1.0658 | (0.7997, 1.4205) | 0.6373 | 0.48 | (0.4734, 2.3996) | 77.2% | (61.2%, 86.6%) |
PI, prediction interval.