Table 5.
Univariate and multivariate meta-regression analyses of potential sources of heterogeneity
| Heterogeneity Factors | exp(b) | SE | t | P | 95% CI | tau2 | I-squared_res | Adj R-squared |
|---|---|---|---|---|---|---|---|---|
| Univariate | ||||||||
| Publication year | 0.9977 | 0.0038 | − 0.61 | 0.549 | 0.9896, 1.0058 | 0.0216 | 93.69% | − 4.07% |
| Sample size | 0.9996 | 0.0002 | − 1.29 | 0.215 | 0.9992, 1.0002 | 0.0200 | 92.70% | 3.56% |
| Country | 0.9433 | 0.0815 | − 0.68 | 0.508 | 0.7867, 1.1311 | 0.0214 | 94.23% | − 3.41% |
| Mental stress | 1.0508 | 0.0201 | 2.59 | 0.018 | 1.0094, 1.0938 | 0.0151 | 88.73% | 26.96% |
| Diagnostic techniques | 1.0395 | 0.0200 | 2.01 | 0.060 | 0.9983, 1.0825 | 0.017 | 89.82% | 17.71% |
| Diagnostic measurements | 1.0187 | 0.0282 | 0.67 | 0.512 | 0.9611, 1.0797 | 0.0212 | 93.95% | − 2.46% |
| Multivariate | 0.0151 | 87.62% | 26.97% | |||||
| Mental stress | 1.0433 | 0.0260 | 1.70 | 0.108 | 0.9896, 1.0999 | |||
| Diagnostic techniques | 1.0145 | 0.0239 | 0.61 | 0.551 | 0.9650, 1.0665 | |||
| Diagnostic measurements | 1.0263 | 0.0250 | 1.07 | 0.302 | 0.9747, 1.0807 | |||