Table 3. Associations between smoking status and lung cancer mortality.

Variable	Number of teeth
	≥20	10–19	0–9	P-value
Never smoker
Number of death	5/3,581	3/1,426	10/1,425
Multivariate adjusteda	1	1.25 (0.29–5.44)	3.56 (1.02–12.45)	0.05
Current and past smokers with <30 pack-years
Number of death	7/1,472	8/472	18/514
Multivariate adjusteda	1	1.99 (0.71–5.61)	2.52 (0.99–6.42)	0.06
Current and past smokers with ≥30 pack-years
Number of death	20/1,088	16/556	26/654
Multivariate adjusteda	1	1.25 (0.64–2.45)	1.33 (0.69–2.53)	0.45

^aAdjusted for age, sex, body mass index, alcohol consumption, education level, marital status, physical exercise, and medical history of hypertension and diabetes mellitus.