Table 1 Characteristics of the subjects by machine-measured nicotine yield of cigarette
Characteristics | Machine-measured nicotine yield (mg/cigarette) | Total | |||
|---|---|---|---|---|---|
0.1 | 0.2–0.8 | 0.9–2.4 | p | ||
Number of subjects | 87 | 223 | 148 | 458 | |
Mean and SD of mahchine-measured nicotine yield (mg/cigarette) | 0.1 | 0.5 ± 0.2 | 1.1 ± 0.4 | 0.6 ± 0.4 | |
Mean and SD of age | 53.6 ± 10.4 | 50.6 ± 9.34 | 50.8 ± 10.4 | 51.2 ± 9.9 | 0.07 |
Mean and SD of number of cigarettes per day | 23.4 ± 12.2 | 24.5 ± 10.7 | 24.4 ± 9.5 | 24.4 ± 10.6 | 0.93 |
Mean and SD of FTND | 5.1 ± 2.5 | 5.4 ± 2.3 | 5.6 ± 2.0 | 5.4 ± 2.2 | 0.21 |
Number of smokers at each category of FTND | |||||
FTND score 0–3 | 19 (21.8%) | 47 (21.1%) | 21 (14.2%) | 87 (19.0%) | |
FTND score 4–6 | 40 (46.0%) | 100 (44.8%) | 78 (52.7%) | 218 (47.6%) | 0.41 |
FTND score 7–10 | 28 (32.2%) | 76 (34.1%) | 49 (33.1%) | 153 (33.4%) | |
Number of smokers having attempted to quit | 50 (61.0%) | 132 (59.5%) | 84 (56.8%) | 269 (58.9%) | 0.73 |
Number of smokers at each stage of behavioral change in quitting process | |||||
Precontemplation-1 | 16 (18.6%) | 47 (21.3%) | 58 (39.7%) | 121 (26.7%) | 0.001 |
Precontemplation-2 | 48 (55.8%) | 131 (59.3%) | 62 (42.5%) | 241 (53.2%) | |
Contemplation | 20 (23.3%) | 33 (14.9%) | 23 (15.6%) | 76 (16.8%) | |
Preparation | 2 (2.3%) | 10 (4.5%) | 3 (2.1%) | 15 (3.3%) | |
Mean and SD of urinary cotinine concentration (mean-SD, mean+SD*) | 535 (1782,160) | 770 (1981,299) | 1010 (2071,492) | 784 (484, 1264) | <0.001 |