Table 2 Predictors for smoking abstinence in baseline smokers at 1-year follow-up (univariate analysis)

Parameter	CT group			Control group
Parameter	Continuous smokers(n = 1288)	Recent quitters(n = 174)	p Value	Continuous smokers(n = 1230)	Recent quitters(n = 165)	p Value
Age at onset of smoking (years)	17.1 (3.8)	17.5 (4.3)	0.15	17.1 (3.8)	16.8 (3.5)	0.38
FEV₁/FVC	70.1 (7.8)	68.6 (9.3)	0.03	70.7 (8.3)	69.9 (8.2)	0.23
Cigarettes/day	18.8 (6.2)	17.7 (4.8)	0.02	18.4 (5.7)	17.9 (6.4)	0.28
Pack-years	36.6 (13.1)	33.4 (11.1)	<0.01	35.7 (12.8)	33.9 (14.0)	0.09
Fagerström score (Q₁)	2.8 (1.0)	2.4 (1.0)	<0.01*	2.8 (1.0)	2.5 (1.0)	<0.01*
Motivation score	3.2 (1.2)	3.7 (1.0)	<0.01*	3.3 (1.2)	3.5 (1.1)	<0.01*

Values are mean (SD) baseline values.
FEV₁, forced expiratory volume in 1 s; FVC, forced vital capacity.
*Wilcoxon rank sum test.