Table 2.
Distribution of Patient Characteristics by Surgery Receipt Among KPNC Member and Non-members
| Characteristic, N (%) | KPNC Members (N=1565) | p-value | Non-members (N=4221) | p-value | |||
|---|---|---|---|---|---|---|---|
| Surgery (N=1252) | No Surgery (N=313) | Surgery (N=3212) | No Surgery (N=1009) | ||||
| Age at diagnosis, years | |||||||
| <60 | 261 (20.8) | 18 (5.7) | <0.0001 | 706 (22.0) | 135 (13.4) | <0.0001 | |
| 60–69 | 494 (39.5) | 81 (25.9) | 1122 (34.9) | 305 (30.2) | |||
| 70+ | 497 (39.7) | 214 (68.4) | 1384 (43.1) | 569 (56.4) | |||
| Race/Ethnicity | |||||||
| Non-Hispanic White | 909 (72.6) | 228 (72.8) | <0.0001 | 2448 (76.2) | 727 (72.1) | <0.0001 | |
| Black | 82 (6.6) | 44 (14.1) | 168 (5.2) | 96 (9.5) | |||
| Hispanic | 58 (4.6) | 13 (4.2) | 180 (5.6) | 75 (7.4) | |||
| Asian/Pacific Islander | 203 (16.2) | 28 (8.9) | 416 (13.0) | 111 (11.0) | |||
| Gender | |||||||
| Male | 517 (41.3) | 147 (47.0) | 0.07 | 1466 (45.6) | 520 (51.5) | 0.001 | |
| Female | 735 (58.7) | 166 (53.0) | 1746 (54.4) | 489 (48.5) | |||
| Marital status | |||||||
| Single | 422 (33.7) | 142 (45.4) | <0.0001 | 1275 (39.7) | 540 (53.5) | <0.0001 | |
| Married/Partner | 777 (62.1) | 150 (47.9) | 1903 (59.3) | 449 (44.5) | |||
| Unknown | 53 (4.2) | 21 (6.7) | 34 (1.0) | 20 (2.0) | |||
| Socioeconomic status | |||||||
| I (low) | 202 (16.1) | 76 (24.3) | 0.003 | 800 (24.9) | 369 (36.6) | <0.0001 | |
| II | 307 (24.5) | 80 (25.5) | 780 (24.3) | 279 (27.7) | |||
| III | 388 (31.0) | 75 (24.0) | 780 (24.3) | 203 (20.1) | |||
| IV (high) | 355 (28.4) | 82 (26.2) | 852 (26.5) | 158 (15.6) | |||
| Tumor stage | |||||||
| I | 1052 (84.0) | 245 (78.3) | 0.02 | 2620 (81.6) | 754 (74.7) | <0.0001 | |
| II | 200 (16.0) | 68 (21.7) | 592 (18.4) | 255 (25.3) | |||
| Tumor size | |||||||
| ≤1.5 | 209 (16.7) | 33 (10.5) | <0.0001 | 569 (17.7) | 87 (8.6) | <0.0001 | |
| 1.6–3 | 584 (46.6) | 102 (32.6) | 1367 (42.6) | 325 (32.2) | |||
| 3.1–4.5 | 251 (20.0) | 77 (24.6) | 721 (22.4) | 220 (21.8) | |||
| 4.6+ | 201 (16.1) | 86 (27.5) | 530 (16.5) | 287 (28.4) | |||
| Unknown | 7 (0.6) | 15 (4.8) | 25 (0.8) | 90 (8.9) | |||
| Histologic subtype | |||||||
| Adenocarcinoma | 660 (52.7) | 106 (33.9) | <0.0001 | 2112 (65.8) | 375 (37.2) | <0.0001 | |
| Squamous cell carcinoma | 281 (22.4) | 105 (33.5) | 718 (22.3) | 339 (33.6) | |||
| Other | 231 (18.5) | 18 (5.8) | 214 (6.7) | 51 (5.0) | |||
| NSCLC, NOS | 80 (6.4) | 84 (26.8) | 168 (5.2) | 244 (24.2) | |||
| Radiation therapy received1 | |||||||
| Yes, radiosurgery | 1 (0.1) | 27 (8.6) | 4 (0.1) | 85 (8.4) | <0.0001 | ||
| Yes, other radiation therapy | 63 (5.03) | 160 (51.1) | 242 (7.5) | 483 (47.9) | |||
| No | 1188 (94.9) | 126 (40.3) | 2966 (92.3) | 441 (43.7) | |||
| Chemotherapy received | |||||||
| Yes | 270 (21.6) | 86 (27.5) | 0.03 | 682 (21.2) | 341 (33.8) | <0.0001 | |
| No | 982 (78.4) | 227 (72.5) | 2530 (78.8) | 668 (66.2) | |||
1
p-value not reported for KPNC members due to small cell sizes