Table 2. Univariate and adjusted Cox proportional hazards for incident lung cancer in women living in Rancho Bernardo, California, from 1972 to 2002 (N = 2,861).

	Univariate hazards			Adjusted hazardsa
Variable	Hazard ratio	95% CI		Hazard ratio	95% CI
Hormone status (yes vs no)	1.23	0.80-1.87		1.13	0.73-1.73
Age	1.05	1.03-1.08		1.08	1.06-1.11
BMI	0.96	0.90-1.03		0.96	0.90-1.03
Education category
College graduate or moreb	1.0			1.0
Some college	1.58	0.90-2.77		1.51	0.86-2.67
High school graduate or less	1.17	0.66-2.10		1.11	0 62-1.99
Marital status (married vs other)	0.47	0.29-0.76		0.66	0.40-1.10
Smoking status
Never smokedb	1.0			1.0
Former smoker	1.98	1.01-3.88		2.17	1.10-4.26
1-10 cigarettes/d	2.77	1.19-6.42		3.67	1.57-8.58
11-20 cigarettes/d	5.37	2.81-10.27		7.69	3.94-15.00
21 or more cigarettes/d	9.69	5.23-17.95		16.22	8.47-31.06
Pc			<0.0001			<0.0001

BMI, body mass index.

^aAdjusted for all other variables in the table.

^bReference category.

^cP trend for smoking status.