Table Ib.
Baseline Characteristics of Stage IV Non-small Cell Lung Cancer Patients According to Treatment Received
| Characteristic | Untreated (N=8,169) |
Chemotherapy (N=6,634) |
P-value |
|---|---|---|---|
| Age (median, IQR) | 78 (8) | 75 (7) | <0.0001 |
| Female, N (%) | 3,689 (45.2) | 2,895 (43.6) | 0.06 |
| Married, N (%) | 3,928 (48.1) | 3,967 (59.8) | <0.0001 |
| Race/Ethnicity, N (%) | |||
| White | 6,464 (79.1) | 5,647 (85.1) | <0.0001 |
| Black | 822 (10.1) | 437 (6.6) | |
| Hispanic | 341 (4.2) | 217 (3.3) | |
| Other | 542 (6.6) | 333 (5.0) | |
| Median Annual Neighborhood Income, N(%) | |||
| First Quartile* | 2,281 (27.9) | 1,491 (22.5) | <0.0001 |
| Second Quartile | 2,022 (24.8) | 1,594 (24.1) | |
| Third Quartile | 1,946 (23.8) | 1,641 (24.8) | |
| Fourth Quartile | 1,917 (23.5) | 1,903 (28.7) | |
| Comorbidity Score, N (%) | |||
| <1 | 3,021 (37.0) | 3,036 (45.8) | <0.0001 |
| 1–2 | 1,964 (24.0) | 1,745 (26.3) | |
| >2 | 3,184 (39.0) | 1,853 (27.9) | |
| Histology, N (%) | |||
| Adenocarcinoma | 4,459 (54.6) | 4,008 (60.4) | <0.0001 |
| Squamous Cell | 2,198 (5.7) | 1,593 (24.0) | |
| Large Cell | 464 (5.7) | 406 (6.1) | |
| Other | 1,048 (12.8) | 627 (9.5) | |
| Tumor Site, N (%) | |||
| Upper | 3,358 (41.1) | 2,946 (44.4) | <0.0001 |
| Middle | 310 (3.8) | 257 (3.9) | |
| Lower | 2,050 (25.1) | 1,695 (25.6) | |
| Unknown | 2,451 (30.0) | 1,736 (26.2) |
*
Indicate lowest income quartile