Table 4.

Causes of patient death in smoking-cessation group and continuing-smoking group

Causes of death	Both groups, n	Quitting smoking, n (%)	Continuing smoking, n (%)	P-value
AECOPD	60	21 (52.5)	39 (53.4)	0.926
Cardiovascular disease	17	6 (15)	11 (15.1)	0.992
Lung cancer	15	6 (15)	9 (12.3)	0.692
Pulmonary infection	9	3 (7.5)	6 (8.2)	0.894
Other diseases	12	4 (10)	8 (11.0)	0.876
Total	113	40	73	0.002

Note: Statistically significant values are shown in bold.

Abbreviation: AECOPD, acute exacerbation Chronic Obstructive Pulmonary Disease.