Table 1.

Selected Baseline Characteristics in Relation to Smoking Status at Cohort Entry, California Teachers Study, 1995–2007

Characteristic	No. of Subjects	Smoking Status at Cohort Entry
		Never Smokers, %		Former Smokers, %	Current Smokers, %
		Those Without Household Passive Smoking Exposure	Those With Household Passive Smoking Exposure
Total no. of participants	121,216a	19.0	46.2	28.6	5.1
Age at cohort entry, years
<35	12,741	22.0	10.4	4.0	5.9
35–44	21,448	22.7	19.6	12.1	13.4
45–54	36,468	25.0	31.0	31.9	31.0
55–64	23,475	12.8	17.8	25.1	25.7
65–74	17,797	10.6	13.7	18.5	17.6
75–84	9,287	6.9	7.6	8.4	6.4
Age-adjusted data
Race
Non-Hispanic white	104,815	84.4	85.5	89.8	86.9
Other	16,401	15.6	14.5	10.2	13.1
First-degree family history of lymphoma
No	114,276	94.7	94.3	94.5	94.0
Yes	3,177	2.5	2.7	2.7	2.5
Unknown/adopted	3,763	2.9	3.0	2.8	3.6
Neighborhood socioeconomic status, in quartiles (from low to high)
1	5,287	4.3	4.3	3.3	4.9
2	20,799	16.7	17.0	14.8	17.7
3	39,228	32.8	32.5	30.5	33.4
4	54,356	45.0	44.9	50.2	42.6
Unknown	1,546	1.3	1.3	1.2	1.4
Diabetes mellitus
No	117,766	97.8	97.3	97.3	96.9
Yes	3,450	2.3	2.7	2.7	3.1
Alcohol consumption, g/day
0	38,619	45.2	33.6	21.3	22.0
<15	56,970	42.2	49.8	50.9	44.1
≥15	19,301	8.6	12.8	23.9	29.6
Unknown	6,326	4.0	3.8	3.9	4.3
Body mass indexb
<20	12,649	12.7	10.0	8.6	10.1
20–24.9	58,208	50.1	47.6	48.4	47.9
25–29.9	29,104	21.9	24.3	25.0	25.6
≥30	16,418	12.2	15.0	14.6	12.3
Unknown	4,837	3.1	3.1	3.4	4.0

^aA total of 1,345 (1.1%) women had missing information on baseline cigarette smoking or exposure to household passive smoking.

^bWeight (kg)/height (m)².