Table 3.
Odds ratios of spontaneous abortion among generalised estimate equation of all pregnancies
| Pregnancy | SA | Crude GEE | Adjusted GEEa | |||
|---|---|---|---|---|---|---|
| (N = 4037) | (N = 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 |
FAB fabrication process worker, PKG package process worker
GEE generalized estimating equation, OR odds ratio, CI confidence interval
Values displaying significant differences are shown in bold (p-value ≤ 0.05)
aAdjusted for age, BMI, education, smoking, duration of employment, year of conception, study plant