From: The relationship between spontaneous abortion and female workers in the semiconductor industry
 | Pregnancy | SA | Crude GEE | Adjusted GEEa | ||
---|---|---|---|---|---|---|
(NÂ =Â 4037) | (NÂ =Â 529) | OR | (95% CI) | OR | (95% CI) | |
The job held longest | ||||||
 FAB | 2314 | 291 (12.6) | 1.12 | 0.81–1.57 | 1.12 | 0.79–1.58 |
 PKG | 1372 | 199 (14.5) | 1.28 | 0.91–1.81 | 1.26 | 0.88–1.79 |
 Clerical worker | 351 | 39 (11.1) | 1.0 |  | 1.0 |  |
Age at conception (years) | ||||||
 ≤29 | 2965 | 354 (11.9) | 1.0 |  | 1.0 |  |
 30–34 | 951 | 141 (14.8) | 1.25 | 1.03–1.50 | 1.28 | 1.02–1.60 |
 ≥35 | 121 | 34 (28.1) | 2.41 | 1.75–3.33 | 2.48 | 1.69–3.64 |
Duration of employment (years) | ||||||
 ≤4 | 872 | 93 (10.7) | 1.0 |  | 1.0 |  |
 5–9 | 1962 | 268 (13.7) | 1.29 | 1.02–1.63 | 1.22 | 0.96–1.54 |
 ≥10 | 1203 | 168 (14.0) | 1.37 | 1.06–1.78 | 1.06 | 0.78–1.43 |
Year of conception | ||||||
 ≥2009 | 2545 | 372 (14.6) | 1.0 |  | 1.0 |  |
 ≤2008 | 1492 | 157 (10.5) | 0.73 | 0.60–0.88 | 0.84 | 0.68–1.02 |