TABLE 2.
Univariate and multivariate analyses of the methodological quality score.
| Study characteristics | Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|
| β (95% CI) | p | β (95% CI) | p | ||
| PRISMA | Not mentioned (=0) | ||||
| Mentioned (=1) | 1.20 (−1.25, 3.65) | 0.317 | 0.49 (−1.69, 2.68) | 0.640 | |
| Journal | IF ≤ 2 (=0) | ||||
| IF > 2 (=1) | 2.81 (0.69, 4.92) | 0.012 | 2.14 (−0.12, 4.41) | 0.062 | |
| Funding | No/not mentioned (=0) | ||||
| With funds (=1) | 2.68 (0.40, 4.96) | 0.024 | 1.65 (−0.83, 4.12) | 0.177 | |
Note: IF, impact factor. The numbers in parentheses represent the assignments used in the model (VIFmax = 1.30).