Demographics of participants consented for sputum testing for p16 methylation
| Variables | Total participants (N=35) | Non-methylated participants (N=28) | Methylated participants (N=7) | |||
|---|---|---|---|---|---|---|
| N | % | N | % | N | % | |
| Gender | ||||||
| Male | 34 | 97 | 23 | 96 | 7 | 100 |
| Age | ||||||
| Mean (SD) | 61.3 (7.8) | 61.6 (6.6) | 59.9 (12.2) | |||
| Ethnicity | ||||||
| White | 26 | 74 | 21 | 75 | 5 | 71 |
| Black | 7 | 20 | 6 | 21 | 1 | 14 |
| Multiple | 2 | 6 | 1 | 4 | 1 | 14 |
| Education | ||||||
| <High school | 9 | 36 | 8 | 29 | 1 | 14 |
| High school | 6 | 17 | 6 | 21 | 0 | 0 |
| Trade school | 5 | 14 | 3 | 11 | 2 | 29 |
| Some college | 10 | 29 | 6 | 21 | 4 | 57 |
| College | 4 | 11 | 4 | 14 | 0 | 0 |
| Postgraduate | 1 | 3 | 1 | 4 | 0 | 0 |
| Age started smoking | ||||||
| Mean (SD) | 14.8 (6.2) | 15.4 (6.2) | 14.5 (2.3) | |||
| Cigarettes/day | ||||||
| Mean (SD) | 19.2 (10.0) | 20.5 (9.7) | 13.8 (9.9) | |||
| Type of cigarette smoked | ||||||
| Regular | 15 | 43 | 14 | 50 | 1 | 14 |
| Light | 15 | 43 | 9 | 32 | 6 | 86 |
| Ultralight | 5 | 14 | 5 | 18 | 0 | 0 |
| Spirometry | ||||||
| FEV1 | 1.41 (0.67) | 1.31 (0.65) | 1.79( 0.68) | |||
| FVC | 3.08 (0.95) | 2.91 (0.92) | 3.75 (0.78) | |||
| FEV1/FVC | 44.96 (12.38) | 44.29 (12.17) | 47.54 (13.84) | |||
| Lung cancer in the family | ||||||
| Yes | 6 | 17 | 4 | 14 | 2 | 29 |
| No | 25 | 74 | 20 | 74 | 5 | 71 |
| Don't know | 3 | 9 | 3 | 11 | 0 | 0 |
FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.