Table 2.
Distributions of cumulative tar and pack-years for cancer cases and cancer-free controls, stratified by sex
| Variable | Controls | Lung cancer | UADT cancer | ||||||
|---|---|---|---|---|---|---|---|---|---|
| N (%) | Mean (SD) | IQR | Smokers | N (%) | Mean (SD) | N (%) | Mean (SD) | ||
| Tertile 1 | Tertile 2 | ||||||||
| Cumulative tar (kg) | |||||||||
| Overall | 997 (95.9) | 0.86 (1.58) | 0.96 | 0.43 | 2.08 | 598 (97.9) | 2.90 (2.86) | 575 (95.7) | 2.19 (2.78) |
| Men | 589 (56.6) | 1.06 (1.77) | 1.55 | 0.55 | 2.48 | 297 (48.6) | 3.73 (3.17) | 435 (72.4) | 2.50 (2.89) |
| Women | 408 (39.2) | 0.58 (1.21) | 0.53 | 0.30 | 1.45 | 301 (49.3) | 2.09 (2.25) | 140 (23.3) | 1.24 (2.17) |
| Missing | 43 (4.1) | 13 (2.1) | 26 (4.3) | ||||||
| Cigarette pack-years | |||||||||
| Overall | 1039 (99.9) | 9.09 (15.39) | 12.81 | 5.25 | 21.00 | 611 (100) | 30.50 (24.33) | 601 (100) | 21.88 (23.69) |
| Men | 622 (59.8) | 10.68 (16.46) | 17.00 | 6.50 | 25.29 | 303 (49.6) | 36.90 (25.27) | 454 (75.5) | 24.29 (23.66) |
| Women | 417 (40.1) | 6.73 (13.31) | 6.47 | 3.75 | 17.10 | 308 (50.4) | 24.20 (21.63) | 147 (24.5) | 14.43 (22.26) |
| Missing | 1 (0.1) | 0 | 0 | ||||||