Table 2. Changes in daily consumption of cigarettes and self-efficacy.

	Intervention	Control	p value
Average change of daily consumption ±SD	−11.51±9.84	−1.71±8.15	<0.01
Change of self-efficacy score* ±SD
Emotional	5.75±11.40	−0.27±10.04	<0.01
Social	5.69±10.25	1.92±9.03	0.01
Skill	6.29±15.48	1.53±16.17	0.05
Relapse	3.52±11.46	3.20±11.30	0.76
Attempt	2.19±6.74	1.43±8.19	0.51

* : The change of a self-efficacy score was the difference between corresponding score at follow-up and the score at baseline.