Table 1.
Demographics and tobacco use history among smokeless tobacco (ST) users enrolled in a smokeless tobacco reduction study.
| Variable | Tobacco-free snuff |
Control |
||||
|---|---|---|---|---|---|---|
| Mean (SD) | % | Number of subjects |
Mean (SD) | % | Number of subjects |
|
| Age, years | 33.7 (7.3) | 52 | 31.5 (6.6) | 54 | ||
| Total cotinine, ng/ml urine | 10,602 (6,340) | 51 | 10,250 (5,750) | 53 | ||
| Age at daily ST use, years | 20.2 (6.1) | 52 | 18.6 (5.1) | 54 | ||
| Age at first ST use, years | 17.1 (6.6) | 52 | 15.5 (3.5) | 54 | ||
| Tins/week | 4.2 (1.7) | 52 | 4.2 (1.8) | 54 | ||
| Total NNAL, pmol/ml urine | 3.0 (2.3) | 40 | 2.6 (1.50) | 42 | ||
| Brand of smokeless | ||||||
| Copenhagen | 28.8 | 15 | 35.2 | 19 | ||
| Skoal | 19.2 | 10 | 14.8 | 8 | ||
| Kodiak | 42.3 | 22 | 33.3 | 18 | ||
| Red Man | 7.7 | 4 | 14.8 | 8 | ||
Note. SD, standard deviation.