Saliva cotinine concentrations according to monthly users of cigarettes and snus
| Saliva cotinine (ng/ml) | Only cigarettes | Only snus | Both cigarettes and snus | |||
|---|---|---|---|---|---|---|
| Number | % | Number | % | Number | % | |
| χ2 p = 0.045. | ||||||
| ⩽5 | 23 | 33.3 | 5 | 17.9 | 1 | 6.2 |
| >5 | 46 | 66.7 | 23 | 82.1 | 15 | 93.8 |
| Total | 69 | 100 | 28 | 100 | 16 | 100 |