Table 1.
Characteristics of study participants.
| Variable | Lung Cancer Cases (n=341) | Controls (n=752) | p-value |
|---|---|---|---|
| Gender (n, %) | |||
| Male | 158 (46.3) | 342 (45.5) | 0.793 |
| Female | 183 (53.7) | 410 (54.5) | |
| Race (n, %) | |||
| White | 190 (55.7) | 388 (51.6) | 0.206 |
| Black | 151 (44.3) | 364 (48.4) | |
| Age (mean, SD) | 63.7 (9.8) | 61.5 (9.3) | 0.001 |
| Family history of lung cancer (n, %) | |||
| No | 259 (76.2) | 640 (85.1) | <0.001 |
| Yes | 81 (23.8) | 112 (14.9) | |
| Smoking status (n, %) | |||
| Never1 | 24 (7.0) | 7 (0.9) | <0.001 |
| Ever | 317 (93.0) | 745 (99.1) | |
| Pack years (smokers only) (mean, SD) | 43.6 (30.4) | 36.2 (25.5) | <0.001 |
| Histology | |||
| Adenocarcinoma | 180 (53.6) | ||
| Squamous cell | 90 (26.8) | ||
| Other NSCLC2 | 15 (4.5) | -- | |
| Small Cell | 30 (8.9) | ||
| Other | 21 (6.2) | ||
| Stage3 | |||
| I | 84 (24.9) | -- | |
| II | 50 (14.8) | -- | -- |
| III | 90 (26.6) | -- | |
| IV | 114 (33.7) | -- | |
1
Never smokers are defined as having smoked fewer than 100 cigarettes in their lifetime.
2
Other non-small cell lung cancer (NSCLC) includes types such as adenosquamous and large cell.
3
Stage is defined according to American Joint Committee on Cancer guidelines.