Table 2.
Description of control and case populations
| Control n (%) | Case n (%) | SCC n (%) | ADC n (%) | |
| Male | 87 (0.67) | 69 (0.87) | 44 (0.85) | 25 (0.93) |
| Female | 43 (0.33) | 10 (0.13) | 8 (0.15) | 2 (0.07) |
| Mean age (yr) | 56 [19; 87] | 62 [40; 85] | 60 [40; 78] | 66 [51; 85] |
| Tobacco duration12 (years of smoking) | ||||
| Non-smokers | 66 (0 .66) | 6 (0.13) | 2 (0.07) | 4 (0.22) |
| 1-19 | 13 (0.13) | 2 (0.04) | 0 (-) | 2 (0.11) |
| +20 | 21 (0.21) | 40 (0.83) | 28 (0.93) | 12 (0.67) |
| Alcohol consumption34 (g of ethanol per week) | ||||
| 0-228 | 11 (0.64) | 13 (0.28) | 4 (0.14) | 9 (0.50) |
| 228.5 - / + 470 | 6 (0.36) | 35 (0.72) | 26 (0.86) | 9 (0.50) |
1
Tobacco duration (year);
2
Data were available for 77% of controls, 61% of cases, including 58% of SCC and 67% of ADC;
3
Alcohol consumption (gram of ethanol per week);
4
Data for alcohol consumption were available for only 13% of controls, 61% of cases, including 58% of SCC and 67% of ADC.