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. 2020 Jun 1;20:505. doi: 10.1186/s12885-020-06971-6

Table 1.

Patient characteristics in the study

Variable Total (n = 4971) Training Cohort (n = 3479) Validation Cohort (n = 1492) P
Age, median (25th–75th percentile 63(54–72) 63(54–72) 63(54–72) 0.821
Sex n (%) 0.475
 Male 2597 (52.2) 1806 (51.9) 791 (53.0)
 Female 2374 (47.7) 1673 (48.1) 701 (47.0)
Race n (%) 0.832
 White 3929 (79.0) 2751 (79.2) 1173 (78.6)
 Black 824 (16.6) 574 (16.5) 250 (16.7)
 Other 218 (4.4) 149 (4.3) 69 (4.6)
Marital status n (%) 0.895
 Married 3135 (63.1) 2192 (63.0) 943 (63.2)
 Unmarried 1836 (36.9) 1287 (37.0) 549 (36.8)
Grade n (%) 0.143
 I 2962 (59.6) 2080 (59.8) 882 (59.1)
 II 1412 (28.4) 1000 (28.7) 412 (27.6)
 III 565 (11.4) 374 (10.7) 191 (12.8)
 IV 32 (0.6) 25 (0.7) 7 (0.5)
AJCC TNM stage n (%) 0.062
 I 729 (14.7) 541 (15.5) 188 (12.6)
 II 1024 (20.6) 707 (20.0) 317 (21.2)
 III 2108 (42.4) 1459 (41.9) 649 (43.5)
 IV 1110 (22.3) 772 (22.2) 338 (22.6)
Insurance Status 0.279
 Insured 4320 (86.9) 3038 (87.3) 1282 (85.9)
 Medicaid 497 (10.0) 341 (9.8) 156 (10.4)
 Uninsured 154 (3.1) 100 (2.9) 54 (3.6)
Surgery 0.199
 Yes 4525 (91.0) 3155 (90.7) 1370 (91.8)
 No 446 (9.0) 324 (9.3) 122 (8.2)
Radiation 0.628
 Yes 111 (2.2) 80 (2.3) 31 (2.1)
 No 4860 (97.7) 3399 (97.7) 1461 (97.9)
Chemotherapy 0.432
 Yes 897 (18.0) 618 (17.8) 279 (18.7)
 No 4074 (81.9) 2861 (82.2) 1213 (81.2)