Table 6 Regression model for dichotomous outcomes (50 studies)
Covariate | Coefficient | 95% Confidence Interval | P-value |
|---|---|---|---|
Constant | -244.1 | -2103.0 to 1614.9 | 0.792 |
Year (per year) | 0.2 | -0.7 to 1.1 | 0.682 |
Age (per year) | -2.4 | -4.0 to -0.9 | 0.003 |
% Female (per 0.01 increase) | -0.1 | -1.0 to 0.7 | 0.777 |
Cochrane Level of Bias | |||
 Low (reference) | 0 |  |  |
 Some | -9.8 | -25.3 to 5.8 | 0.213 |
 High | -11.0 | -35.9 to 13.9 | 0.377 |
Route | |||
 Injection (reference) | 0 |  |  |
 Oral | 6.4 | -4.8 to 17.6 | 0.253 |
 IV | 11.5 | 1.5 to 21.4 | 0.025 |