. Author manuscript; available in PMC: 2015 Sep 17.

Published in final edited form as: Am J Obstet Gynecol. 2011 Dec 30;206(4):327.e1–327.e8. doi: 10.1016/j.ajog.2011.12.030

Table 3.

Association between occupational exposures during the first trimester and spontaneous abortion

Occupational Exposures	Odds Ratio (95% Confidence Interval)
Occupational Exposures	Age-adjusted Models^a	Combined Exposures^b	Full Model^c
Anesthetic gases
<1 hour per day (reference)	1.0	1.0	1.0
1+ hours per day	1.07 (0.81–1.40)	0.85 (0.63–1.17)	0.88 (0.65–1.21)
Antineoplastic agents
<1 hours per day (reference)	1.0	1.0	1.0
1+hours per day	1.97 (1.41–2.76)	2.03 (1.39–2.97)	1.94 (1.32–2.86)
Antiviral agents
<1 hours per day (reference)	1.0	1.0	1.0
1+ hours per day	1.28 (0.93–1.76)	0.93 (0.65–1.34)	0.92 (0.64–1.32)
Sterilizing agents
<1 hour per day (reference)	1.0	1.0	1.0
1+ hours per day	1.46 (1.12–1.91)	1.46 (1.09–1.95)	1.39 (1.03–1.87)
X-ray radiation
<1 hour per day (reference)	1.0	1.0	1.0
1+ hours per day	1.31 (1.05–1.62)	1.27 (1.01–1.60)	1.22 (0.97–1.55)

The Age-adjusted Model evaluated each exposure independently, adjusting for age

The Combined Exposures Model tested each work exposure with all work exposures, adjusting for age

The Full Model includes all work exposures, adjusting for age, parity, shift work, and hours worked.