Table 1.
Distribution of Patient Characteristics Among KPNC Members and Non-members
| Characteristic | N | KPNC Members (N=1565) |
Non-members (N=4221) |
p-value |
|---|---|---|---|---|
| N (%) | N (%) | |||
| Age at diagnosis, years | ||||
| <60 | 1120 | 279 (17.8) | 841 (19.9) | 0.06 |
| 60–69 | 2002 | 575 (36.7) | 1427 (33.8) | |
| 70+ | 2664 | 711 (45.4) | 1953 (46.3) | |
| Race/Ethnicity | ||||
| Non-Hispanic White | 4312 | 1137 (72.6) | 3175 (75.2) | 0.001 |
| Black | 390 | 126 (8.1) | 264 (6.3) | |
| Hispanic | 326 | 71 (4.5) | 255 (6.0) | |
| Asian/Pacific Islander | 758 | 231 (14.8) | 527 (12.5) | |
| Gender | ||||
| Male | 2650 | 664 (42.4) | 1986 (47.0) | 0.002 |
| Female | 3136 | 901 (57.6) | 2235 (53.0) | |
| Marital status | ||||
| Single | 2379 | 564 (36.0) | 1815 (43.0) | <0.0001 |
| Married/Partnered | 3279 | 927 (59.2) | 2352 (55.7) | |
| Unknown | 128 | 74 (4.7) | 54 (1.3) | |
| Socioeconomic status | ||||
| I (low) | 1447 | 278 (17.8) | 1169 (27.7) | <0.0001 |
| II | 1446 | 387 (24.7) | 1059 (25.1) | |
| III | 1446 | 463 (29.6) | 983 (23.3) | |
| IV (high) | 1447 | 437 (27.9) | 1010 (23.9) | |
| Tumor stage, AJCC 6th ed. | ||||
| I | 4671 | 1297 (82.9) | 3374 (79.9) | 0.01 |
| II | 1115 | 268 (17.1) | 847 (20.1) | |
| Tumor size | ||||
| ≤1.5 | 898 | 242 (15.5) | 656 (15.5) | 0.008 |
| 1.6–3.0 | 2378 | 686 (43.8) | 1692 (40.1) | |
| 3.1–4.5 | 1269 | 328 (21.0) | 941 (22.3) | |
| ≥4.6 | 1104 | 287 (18.3) | 817 (19.4) | |
| Unknown | 22 (1.4) | 115 (2.7) | ||
| Histologic subtype | ||||
| Adenocarcinoma | 3253 | 766 (48.9) | 2487 (58.9) | <0.0001 |
| Squamous cell carcinoma | 1443 | 386 (24.7) | 1057 (25.0) | |
| Other | 514 | 249 (15.9) | 265 (6.3) | |
| NSCLC, NOS | 576 | 164 (10.5) | 412 (9.8) |