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Table 3 Odds ratios of spontaneous abortion among generalised estimate equation of all pregnancies

From: The relationship between spontaneous abortion and female workers in the semiconductor industry

  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
  1. FAB fabrication process worker, PKG package process worker
  2. GEE generalized estimating equation, OR odds ratio, CI confidence interval
  3. Values displaying significant differences are shown in bold (p-value ≤ 0.05)
  4. aAdjusted for age, BMI, education, smoking, duration of employment, year of conception, study plant