Table 1.
Patients Characteristics
| Never n (%) |
≤15 pack years n (%) |
>15 pack years n (%) |
p | |
|---|---|---|---|---|
| 331 (16) | 270 (13) | 1409 (70) | ||
| Age (years) | <0.001 | |||
| Median | 59 | 60 | 65 | |
| Range | 24–93 | 31–87 | 33–90 | |
| Sex | <0.001 | |||
| Male | 114 (34) | 109 (40) | 783 (56) | |
| Female | 217 (66) | 161 (60) | 626 (44) | |
| Race | ||||
| White | 254 (77) | 229 (85) | 1316 (93) | <0.001 |
| Asian | 48 (15) | 16 (6) | 17 (1) | |
| Black | 21 (6) | 21 (8) | 63 (4) | |
| Other/unknown | 8 (2) | 4 (1) | 13 (1) | |
| Histologic Subtype | <0.001 | |||
| Adenocarcinoma | 227(69) | 166(61) | 695 (49) | |
| Squamous cell carcinoma | 13 (4) | 13 (5) | 171 (12) | |
| NSCLC | 91(27) | 91(34) | 543 (39) | |
| Karnofsky Performance Status | 0.02 | |||
| ≥80% | 203 (61) | 166 (61) | 779 (55) | |
| 70% | 61 (18) | 34 (13) | 279 (20) | |
| <70% | 29 (9) | 21 (8) | 153 (11) | |
| Not recorded | 38 (11) | 49 (18) | 198 (14) | |
| Stage | 0.76 | |||
| IIIB | 67 (20) | 51 (19) | 296 (21) | |
| IV | 264 (80) | 219 (81) | 1113 (79) | |
| Weight loss | 0.10 | |||
| >5% | 89 (27) | 88 (33) | 481(34) | |
| ≤5% | 188 (57) | 146 (54) | 750 (53) | |
| Not recorded | 54 (16) | 36 (13) | 178 (13) | |