Table 1. . Descriptive and inferential statistics of continuous and categorical covariates among 38,189 stage III melanoma patients who were treated with (n = 9906) and without (n = 28,283) immunotherapy.
| Variable | Class | All patients (n = 38,189) | Immunotherapy (n = 9906) | No immunotherapy (n = 28,283) | p-value |
|---|---|---|---|---|---|
| Age | <65 years | 24,049 (63.0) | 8277 (83.6) | 15,772 (55.8) | <0.0001 |
| ≥65 years | 14,140 (37.0) | 1629 (16.4) | 12,511 (44.2) | ||
| Race | Other | 3598 (9.4) | 957 (9.7) | 2641 (9.3) | 0.3435 |
| Caucasian | 34,591 (90.6) | 8949 (90.3) | 25,642 (90.7) | ||
| Sex | Male | 24,029 (62.9) | 5952 (60.1) | 18,077 (63.9) | <0.0001 |
| Female | 14,160 (37.1) | 3954 (39.9) | 10,206 (36.1) | ||
| Insurance status | Not insured | 1761 (4.6) | 505 (5.1) | 1256 (4.4) | <0.0001 |
| Private insurance | 20,657 (54.1) | 7033 (71.0) | 13,624 (48.2) | ||
| Medicaid/other government | 2452 (6.4) | 758 (7.7) | 1694 (6.0) | ||
| Medicare | 13,319 (34.9) | 1610 (16.3) | 11,709 (41.4) | ||
| Positive nodes, n | One node | 22,624 (59.2) | 5452 (55.0) | 17,172 (60.7) | <0.0001 |
| two–three nodes or positive aspiration | 10,203 (26.7) | 2989 (29.3) | 7214 (25.5) | ||
| Four or more nodes or positive nodes documented but number unspecified | 5362 (14.0) | 1465 (14.8) | 3897 (13.8) | ||
| Charlson–Deyo score | 0 | 32,144 (84.2) | 8754 (88.4) | 23,390 (82.7) | <0.0001 |
| 1 | 4947 (13.0) | 1014 (10.2) | 3933 (13.9) | ||
| 2 or 3 | 1098 (2.9) | 138 (1.4) | 960 (3.4) | ||
| Vital status | Dead | 16,872 (44.2) | 3578 (36.1) | 13,294 (47.0) | <0.0001 |
| Alive | 21,317 (55.8) | 6328 (63.9) | 14,989 (53.0) |