Cigarette smoking and all-cause mortality in rural Chinese male adults: 15-year follow-up of the Anqing cohort study

Table 4 The relation of smoking cessation age and pack-years with mortality in former smoker

Smoking Status	N	Deaths (%)	Crude		Adjusted^a
Smoking Status	N	Deaths (%)	OR (95%CI)	*P value*	OR (95%CI)	*P value*
Never	990	74 (7.5)	ref		ref
Age at cessation, yrs
< 55	465	59 (12.7)	1.80 (1.25,2.59)	0.002	2.20 (1.49,3.27)	< 0.001
≥ 55	63	16 (25.4)	4.21 (2.29,7.75)	< 0.001	2.22 (1.45,3.41)	0.004
pack-years (<median (26))
< 55	246	32 (13.0)	1.85 (1.19, 2.88)	0.006	2.66 (1.63, 4.33)	< 0.001
≥ 55	10	4 (40.0)	8.25 (2.28,29.85)	0.001	3.96 (1.03,15.14)	0.045
pack-years (≥median (26))
< 55	219	27 (12.3)	1.74 (1.09,2.78)	0.020	1.94 (1.18,3.20)	0.009
≥ 55	53	12 (22.6)	3.62 (1.84,7.13)	< 0.001	2.58 (1.18,5.63)	0.018

^aAdjusted for age, body mass index, systolic blood pressure, diastolic blood pressure, fasting glucose, total cholesterol, triglycerides, high-density lipoprotein cholesterol and alcohol drinking status, education level and occupation

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