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

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 GEE^a
Year of conception	The job held longest	(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

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