Table 1. Smoking characteristics of participants on enrollment (n = 709) .

Characteristics	No. (%) or mean±SD
Smoking amount per day (cigarette)	10.4 ± 6.5
Expired CO (ppm)	10.0 ± 8.3
Nicotine dependency
Low	428 (60.4)
Medium	232 (32.7)
Severe	49 (6.9)
Timing of craving for smoking (multiple answers allowed)
After meal	372(52.5)
Negative situation	224 (31.6)
Habitual	195 (27.5)
After awakening in the morning	140 (19.7)
Age you first smoked (years)	20.0 ± 7.1
Years of smoking (years)	21.6 ± 4.6
Attempt to quit within the last one year, yes	229 (32.3)
Primary reason for quitting in this program
At the request of family and friends	332 (46.8)
My health	275 (38.8)
Price of cigarettes	55 (7.8)
A desire for better hygiene	25 (3.5)
Motivation for smoking cessation	7.0 ± 2.1
Confidence for smoking cessation	5.8 ± 2.0
Readiness for smoking cessation	5.8 ± 2.1
Number of smoking cessation counseling sessions in the first four weeks	4.6 ± 1.6
Number of smoking cessation counseling sessions for six months per person	7.7 ± 3.6
Use of medication therapy, yes	9 (1.3)
Rates of smoking cessation by self-report
Four weeks	307 (43.3)
12 weeks	203 (28.6)
Six months	153 (21.6)

CO, carbon monoxide.