Table 5.
Odds ratios of spontaneous abortion among generalised estimate equation of all pregnancies stratified by year of conception
| Year of conception | The job held longest | Pregnancy | SA | Crude GEE | Adjusted GEEa | ||
|---|---|---|---|---|---|---|---|
| (N = 4037) | (N = 529) | OR | (95% CI) | OR | (95% CI) | ||
| ≤2008 | FAB | 848 | 80 (9.4) | 1.62 | 0.75–3.49 | 1.54 | 0.71–3.32 |
| PKG | 505 | 69 (13.7) | 2.31 | 1.06–5.02 | 2.21 | 1.01–4.81 | |
| Clerical worker | 139 | 8 (5.8) | 1.0 | 1.0 | |||
| ≥2009 | FAB | 1466 | 211 (14.4) | 0.98 | 0.68–1.40 | 1.01 | 0.69–1.48 |
| PKG | 867 | 130 (15.0) | 1.03 | 0.71–1.49 | 1.05 | 0.71–1.55 | |
| Clerical worker | 212 | 31 (14.6) | 1.0 | 1.0 | |||
FAB fabrication process worker, PKG package process worker
GEE generalized estimating equation, SA spontaneous abortion, 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, study plant