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Table 4 Odds ratios of spontaneous abortion among logistic regression model of first pregnancies

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

  Pregnancy SA Crude logistic Adjusted logistica
(N = 2242) (N = 98) OR (95% CI) OR (95% CI)
The job held longest
 FAB 1285 54 (4.2) 1.40 0.60–3.31 1.15 0.46–2.85
 PKG 759 38 (5.0) 1.69 0.70–4.05 1.34 0.52–3.41
 Clerical worker 198 6 (3.0) 1.0   1.0  
Age at conception (years)
 ≤29 1886 71 (3.8) 1.0   1.0  
 30–34 326 21 (6.4) 1.76 1.07–2.91 1.31 0.70–2.47
 ≥35 30 6 (20.0) 6.39 2.53–16.12 4.18 1.40–12.43
Duration of employment (years)
 ≤4 664 24 (3.6) 1.0   1.0  
 5–9 1167 48 (4.1) 1.14 0.69–1.89 0.95 0.56–1.58
 ≥10 411 26 (6.3) 1.80 1.02–3.18 1.30 0.63–2.67
Year of conception
 ≥2009 1275 82 (6.4) 1.0   1.0  
 ≤2008 967 16 (1.7) 0.24 0.14–0.42 0.32 0.18–0.55
  1. FAB fabrication process worker, PKG package process worker
  2. 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