Hazard ratios: short term exposure model
| Lead values (μg/dl) | Relative to external control group | Relative to internal control group | ||
|---|---|---|---|---|
| Hazard ratio | 95% CI | Hazard ratio | 95% CI | |
| With adjustment only for country | ||||
| <20 | 1.62 | (1.22 to 2.14) | 1.14 | (0.86 to 1.51) |
| 20–29 | 1.34 | (1.06 to 1.68) | 0.94 | (0.76 to 1.17) |
| 30–39 | 1.27 | (1.01 to 1.60) | 0.89 | (0.72 to 1.11) |
| 40+ | 1.35 | (1.07 to 1.69) | 0.95 | (0.77 to 1.16) |
| With adjustment for country, mother’s age, smoking, and primiparity | ||||
| <20 | 1.56 | (1.17 to 2.07) | 1.12 | (0.84 to 1.49) |
| 20–29 | 1.32 | (1.05 to 1.67) | 0.96 | (0.77 to 1.19) |
| 30–39 | 1.22 | (0.96 to 1.54) | 0.88 | (0.70 to 1.10) |
| 40+ | 1.30 | (1.03 to 1.63) | 0.93 | (0.76 to 1.15) |