. Author manuscript; available in PMC: 2012 Nov 28.

Published in final edited form as: Cancer Lett. 2011 Jul 12;310(2):216–221. doi: 10.1016/j.canlet.2011.07.007

Table III.

Association of exogenous female hormone (HRT) use among postmenopausal women, stratified by smoking status and tumor site.

	Exogenous Female Hormone Use
	Never (reference)	≤ 5 years			> 5 years
Strata	Cases/ Controls	Cases/ Controls	Crude OR (95% CI)	Adjusted OR (95% CI)	Cases/ Controls	Crude OR (95% CI)	Adjusted OR (95% CI)
Smoking status^a
Never smoker	17/34	5/20	0.50 (0.16-1.58)	0.49 (0.14-1.70)	3/16	0.37 (0.10-1.46)	0.65 (0.15-2.86)
< 10 pack-years	8/10	3/2	2.00 (0.26-15.48)	3.37 (0.35-32.55)	3/10	0.56 (0.05-3.39)	1.84 (0.21-16.12)
≥ 10 pack-years	56/14	15/9	0.42 (0.15-1.15)	0.59 (0.20-1.74)	9/8	0.27 (0.09-0.84)	0.31 (0.09-1.01)
Tumor site^b
Oral cavity	36/58	10/31	0.52 (0.23-1.19)	0.67 (0.27-1.66)	8/34	0.38 (0.16-0.91)	0.54 (0.21-1.43)
Pharynx	22/58	8/31	0.69 (0.27-1.77)	1.29 (0.43-3.86)	3/34	0.31 (0.08-1.14)	0.31 (0.07-1.34)
Larynx	23/58	5/31	0.40 (0.14-1.15)	0.60 (0.13-2.73)	4/34	0.32 (0.10-1.00)	0.27 (0.06-1.24)

Abbreviations: OR = odds ratio; CI = confidence interval

Crude and adjusted models include the frequency-matched factor (age); adjusted model additionally includes highest level of education

Crude and adjusted models include the frequency-matched factor (age); adjusted model additionally includes