Table 1.
Cohort Characteristics (n = 578)
| Characteristic | Overall (n = 578) | No obstructive respiratory disease (n = 530) | Obstructive respiratory disease (n = 48) | p Value* |
|---|---|---|---|---|
| Age, y, median (IQR) | 68.7 (60.6–76.8) | 68.5 (60.1–76.9) | 70.6 (64.3–76.8) | NS (0.1) |
| Sex, n (%) | 0.033 | |||
| Male | 303 (52.4) | 285 (53.8) | 18 (37.5) | |
| Female | 275 (47.6) | 245 (46.2) | 30 (62.5) | |
| Race, n (%) | NS | |||
| African American | 44 (7.6) | 43 (8.1) | 1 (2.1) | |
| Asian | 17 (2.9) | 17 (3.2) | 0 (0) | |
| White | 503 (87.0) | 456 (86) | 47 (97.9) | |
| Other | 2 (0.3) | 2 (0.4) | 0 (0) | |
| Unknown | 12 (2.1) | 12 (2.3) | 0 (0) | |
| Smoking history, n (%) | 0.001 | |||
| Nonsmoker | 336 (58.1) | 320 (60.4) | 16 (33.3) | |
| Past smoker | 242 (41.9) | 210 (39.6) | 32 (66.7) | |
| Obstructive respiratory disease, n (%) | — | |||
| No lung disease | 530 (88.5) | — | — | |
| COPD | 29 (4.8) | — | — | |
| Asthma | 19 (3.2) | — | — | |
| Unknown | 21 (3.5) | — | — | |
| Tumor staging | ||||
| T | NS | |||
| T1 | 107 (18.5) | 101 (19.1) | 6 (12.5) | |
| T2 | 317 (54.8) | 288 (54.3) | 29 (60.4) | |
| T3 | 138 (23.9) | 125 (23.6) | 13 (27.1) | |
| TX | 16 (2.8) | 16 (3) | 0 (0) | |
| N | NS | |||
| N0 | 191 (33) | 171 (32.3) | 20 (41.7) | |
| N1 | 212 (36.7) | 202 (38.1) | 10 (20.8) | |
| N2 | 175 (30.0) | 157 (29.6) | 18 (37.5) | |
IQR, interquartile range.
*
A p value < 0.05 is considered statistically significant.