. Author manuscript; available in PMC: 2014 Jul 1.

Published in final edited form as: Cancer Causes Control. 2013 Apr 13;24(7):1305–1314. doi: 10.1007/s10552-013-0208-y

Table 1.

Hazard ratios (HR) for baseline characteristics and lung cancer risk in a cohort of female textile workers, 1989–2000

Characteristic	Person-years at risk	Cases (N=824)	HR	95% CI
Age at baseline (years)^a
30–39	946,252	49	1.00	referent
40–49	492,960	67	2.60	(1.80–3.76)
50–59	631,654	345	10.45	(7.75–14.09)
60+	406,995	363	17.18	(12.75–23.15)
Smoking^b
Never	2,404,035	723	1.00	referent
Ever (>6 months)	73,478	101	2.19	(1.77–2.70)
Former	11,441	10	1.36	(0.73–2.55)
Current	62,037	91	2.34	(1.88–2.92)
Duration of Smoking (years)^b
<10	21,251	13	1.17	(0.67–2.02)
10–19	17,198	18	1.67	(1.05–2.67)
20–29	15,167	21	2.12	(1.37–3.28)
≥30	19,757	49	3.45	(2.57–4.63)
			p trend	0.0002

Adjusted for smoking (ever/never)

Adjusted for age (using linear splines with knots at 5 year periods)