Table 1.
Varenicline (n=213) | Placebo (n=218) | |
---|---|---|
Physical characteristics | ||
No (%) of men | 189 (89) | 196 (90) |
Mean (SD) age (years) | 43.9 (12.0) | 43.9 (12.0) |
Mean (SD) weight (kg) | 86.0 (13.8) | 86.3 (14.3) |
No (%) white | 211 (99) | 217 (100) |
History of use of smokeless tobacco | ||
Age at first use (years): | ||
Mean (SD) | 22.9 (11.6) | 21.7 (10.2) |
Range | 11-66 | 6-60 |
No of years of use: | ||
Mean (SD) | 20.3 (11.0) | 21.7 (11.8) |
Range | 1-45 | 1-50 |
Portions used per day: | ||
Mean (SD) | 15.4 (5.8) | 15.9 (7.7) |
Range | 8-40 | 8-80 |
Longest period of abstinence in past year (days): | ||
Mean (SD) | 3.1 (11.4) | 5.5 (13.7) |
Range | 0-90 | 0-90 |
No of previous serious quit attempts: | ||
Mean (SD) | 1.72 (2.67) | 2.16 (5.04) |
Range | 0-15 | 0-50 |
No (%) who had never previously attempted to quit | 90 (42) | 77 (35) |
Mean (SD) modified Fagerström test score* | 7.5 (1.6) | 7.6 (1.7) |
No (%) of former smokers | 104 (48) | 104 (49) |
*Modified score 0-10 (maximum). Questionnaire has not been standardised; mean score for representative population of users of smokeless tobacco is unknown.