Table 2.
Cohort 2 of NSCLC patients and cancer-free smokers from whom sputum specimens were collected.
| NSCLC Cases (n = 69) | Controls (n = 79) | p-Value | |
|---|---|---|---|
| Age | 64.18 (SD 6.25) | 63.29 (SD 6.24) | 0.32 |
| Sex | 0.35 | ||
| Female | 26 | 30 | |
| Male | 43 | 49 | |
| Smoking pack-years (median) | 35.25 | 33.29 | 0.41 |
| Stage | |||
| Stage I | 22 | ||
| Stage II | 24 | ||
| Stage III–VI | 23 | ||
| Histological type | |||
| Adenocarcinoma | 36 | ||
| Squamous cell carcinoma | 33 | ||
| Location of primary lung tumors | |||
| Peripheral location | 36 | ||
| Central location | 33 |
Abbreviations: NSCLC, non-small cell lung cancer; Central location: limited to the trachea, bronchi, or segmental bronchi. Peripheral location: limited more to the periphery than the subsegmental bronchi.