Table 1.
Summary of meta-regression analyses for the potential source of heterogeneity.
| Heterogeneity factors | Coefficient | SE | 95% CI | P | |
|---|---|---|---|---|---|
| Univariate meta-regression | |||||
| Proportion of male | 0.034 | 1.505 | (−3.320, 3.389) | 0.982 | |
| Mean age | −0.005 | 0.017 | (−0.042, 0.033) | 0.786 | |
| Interval between DTI and scales | Long | 0.193 | 0.210 | (−0.269, 0.656) | 0.378 |
| Delay to DTI scan | Acute | −0.134 | 0.368 | (−0.953, 0.686) | 0.724 |
| Chronic | −0.263 | 0.404 | (−1.163, 0.636) | 0.528 | |
| Nation | China | −0.351 | 0.373 | (−1.183, 0.480) | 0.369 |
| Norway | −0.671 | 0.450 | (−1.675, 0.333) | 0.167 | |
| US | −0.137 | 0.379 | (−0.982, 0.706) | 0.723 | |
| Multivariate meta-regression | |||||
| Proportion of male | −0.314 | 2.980 | (−7.970, 7.341) | 0.920 | |
| Mean age | −0.001 | 0.053 | (−0.143, 0.130) | 0.905 | |
| Delay to DTI scan | Acute | 0.063 | 0.566 | (−1.393, 1.519) | 0.915 |
| Subacute | 0.050 | 0.589 | (−1.464, 1.563) | 0.936 | |
| Nation | China | −0.322 | 0.862 | (−2.538, 1.894) | 0.724 |
| Norway | −0.617 | 0.874 | (−2.865, 1.630) | 0.511 | |
| US | −0.128 | 0.645 | (−1.787, 1.531) | 0.851 | |
SE, standard error; CI, confidence interval.