Characteristics of the study population and the distribution of reported smoking and toenail biomarker
| . | n (median) . | 5-95 percentile range . |
|---|---|---|
| Age (y) | 2,485 (56.0) | 42-62 |
| Physical activity (h/wk) | 2,027 (2.0) | 1-4 |
| Alcohol intake* (g/d) | 2,217 (1.8) | 0.0-32.8 |
| Body mass index | 2,375 (23.9) | 19.4-34.3 |
| Toenail nicotine for all participants (ng/mg) | 2,485 (0.21) | 0.06-4.06 |
| Toenail nicotine for never smokers with no SHS exposure (ng/mg) | 157 (0.10) | 0.05-0.41 |
| Toenail nicotine for never smokers with SHS exposure (ng/mg) | 768 (0.14) | 0.05-0.83 |
| Toenail nicotine for current smokers (ng/mg) | 771 (1.77) | 0.24-6.34 |
| n | % of Population | |
| Never smokers | 988/2,485 | 40 |
| Past smokers | 726/2,485 | 29 |
| Current smokers | 771/2,485 | 31 |
| SHS among never smokers | 768/2,314 | 33 |
| Occasionally | 70 | |
| Frequently | 30 | |
| Toenails infected with fungus | 568/2,485 | 23 |
| Nail polish used | 122/2,485 | 4.9 |
| . | n (median) . | 5-95 percentile range . |
|---|---|---|
| Age (y) | 2,485 (56.0) | 42-62 |
| Physical activity (h/wk) | 2,027 (2.0) | 1-4 |
| Alcohol intake* (g/d) | 2,217 (1.8) | 0.0-32.8 |
| Body mass index | 2,375 (23.9) | 19.4-34.3 |
| Toenail nicotine for all participants (ng/mg) | 2,485 (0.21) | 0.06-4.06 |
| Toenail nicotine for never smokers with no SHS exposure (ng/mg) | 157 (0.10) | 0.05-0.41 |
| Toenail nicotine for never smokers with SHS exposure (ng/mg) | 768 (0.14) | 0.05-0.83 |
| Toenail nicotine for current smokers (ng/mg) | 771 (1.77) | 0.24-6.34 |
| n | % of Population | |
| Never smokers | 988/2,485 | 40 |
| Past smokers | 726/2,485 | 29 |
| Current smokers | 771/2,485 | 31 |
| SHS among never smokers | 768/2,314 | 33 |
| Occasionally | 70 | |
| Frequently | 30 | |
| Toenails infected with fungus | 568/2,485 | 23 |
| Nail polish used | 122/2,485 | 4.9 |
Using 1980 questionnaire 2 y before the toenail collection.