Table 1.
Sociodemographic and Clinical Characteristics by Study Cohort
| Characteristic | Cohort One: First-Line Chemotherapy (n = 264) |
Cohort Two: Neoadjuvant Chemotherapy (n = 63) |
Cohort Three: Palliative Surgery (n = 79) |
|||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| Age, years | ||||||
| ≤ 60 | 160 | 60.6 | 42 | 66.7 | 38 | 48.1 |
| > 60 | 104 | 39.4 | 21 | 33.3 | 41 | 51.9 |
| Sex | ||||||
| Male | 144 | 54.5 | 47 | 74.6 | 44 | 55.7 |
| Female | 120 | 45.5 | 16 | 25.4 | 35 | 44.3 |
| Histologic subtype | ||||||
| Adenocarcinoma | 205 | 77.7 | 25 | 39.7 | 58 | 73.4 |
| Nonadenocarcinoma | 59 | 22.3 | 38 | 60.3 | 21 | 26.6 |
| Smoking status | ||||||
| Former smoker | 136 | 51.5 | 33 | 52.4 | 36 | 45.6 |
| Never smoker | 128 | 48.5 | 30 | 47.6 | 43 | 54.4 |
| Stage | ||||||
| IIb to IIIa | 0 | 0.0 | 58 | 92.1 | 25 | 31.6 |
| IIIb to IV | 264 | 100.0 | 5 | 7.9 | 54 | 68.4 |