Table 4.
The results of meta-regression (EV-A71)
| Covariate | Coefficient | 95% CI | t | P | Adjusted R2 (%) |
|---|---|---|---|---|---|
| Age | 29.58% | ||||
| <1 y | - | - | - | - | |
| 1-3 y | -.1894914 | -.2742778 -.104705 | -4.40 | 0.000 | |
| 3-5 y | -.1741073 | -.2596863 -.0885282 | -4.01 | 0.000 | |
| < 5 y | -.13795 | -.2150069 -.0608931 | -3.53 | 0.001 | |
| >5 y | .1171723 | .036483 .1978616 | 2.86 | 0.005 | |
| Gender | -1.53% | ||||
| Female | - | - | - | - | |
| Male | -.0013413 | -.1044165 .1017338 | -0.03 | 0.979 | |
| Sampling method | 1.39% | ||||
| Physical examination | - | - | - | - | |
| Random sampling | .1104207 | -.0156826 .2365241 | 1.75 | 0.085 | |
| Conditional sampling | .0836351 | -.0691683 .2364385 | 1.09 | 0.279 | |
| Seasonality | 0.47% | ||||
| Unknown | - | -- | - | - | |
| Seasonal | .1089901 | -.0323517 .2503319 | 1.54 | 0.129 | |
| Non-seasonal | .0829203 | -.072398 .2382386 | 1.06 | 0.291 | |
| Publication language | 0.47% | ||||
| English | - | - | - | - | |
| Chinese | .0610441 | -.0415077 .163596 | 1.19 | 0.240 | |
| Ethnicity | 1.28% | ||||
| Others | - | - | - | - | |
| Chinese | .0723176 | -.0303551 .1749904 | 1.40 | 0.165 |
The first line of every covariate represented reference; adjusted R2 was used to indicate the degree of heterogeneity explained by study characteristics.