Self reported last smoking time and serum cotinine level (ng/ml)
| Cotinine level (ng/ml) | Smoked today or yesterday % | Smoked 2 days – 1 month ago % | Smoked longer time than a month ago % | Never % | Total % |
|---|---|---|---|---|---|
| Men | |||||
| 0 | 3.6 | 62.6 | 93.7 | 97.3 | 64.4 |
| 10–19 | 1.5 | 3.6 | 1.1 | 0.8 | 1.3 |
| 20–49 | 5.7 | 15.8 | 3.1 | 0.8 | 3.9 |
| 50+ | 89.2 | 18.0 | 2.1 | 1.0 | 30.4 |
| Mean | 258 | 33 | 5 | 2 | |
| SD | 172 | 67 | 30 | 15 | |
| N | 881 | 139 | 906 | 828 | 2754 |
| Total | 32.0 | 5.0 | 32.9 | 30.1 | 100.0 |
| Women | |||||
| 0 | 7.4 | 59.5 | 94.8 | 97.3 | 77.5 |
| 10–19 | 1.6 | 7.6 | 1.2 | 1.2 | 1.6 |
| 20–49 | 5.6 | 14.5 | 1.5 | 0.9 | 2.5 |
| 50+ | 85.4 | 18.3 | 2.5 | 0.6 | 18.4 |
| Mean | 198 | 38 | 6 | 2 | |
| SD | 149 | 93 | 50 | 24 | |
| N | 608 | 131 | 671 | 1680 | 3090 |
| Total | 19.7 | 4.2 | 21.7 | 54.4 | 100.0 |