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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