Table 2.
Comparison of Characteristics of the Primary and Validation Sets (%)
| Characteristics | All Patients | Primary Set | Validation Set | P value |
|---|---|---|---|---|
| Patients | 897 | 598 | 299 | |
| Age | 0.824 | |||
| <50 | 81(9.0) | 54 (9.0) | 27 (9.0) | |
| 50–60 | 277(30.9) | 192 (32.1) | 85 (28.4) | |
| 60–70 | 285(31.8) | 186 (31.1) | 99 (33.1) | |
| 70–80 | 169(18.8) | 112 (18.8) | 57(19.1) | |
| >80 | 85(9.5) | 54 (9.0) | 31,910.4) | |
| Race | 0.389 | |||
| White | 534(59.5) | 362 (60.5) | 172 (57.5) | |
| Black | 168(18.7) | 114 (19.1) | 54(18.1) | |
| Other✱✱ | 195(21.7) | 122 (20.4) | 73 (24.4) | |
| Sex | 0.730 | |||
| Female | 192(21.4) | 126 (21.1) | 66 (22.1) | |
| Male | 705(78.6) | 472 (78.9) | 233 (77.9) | |
| Edmonson-Steiner classification | 0.921 | |||
| Unknown | 583(65.0) | 387 (64.7) | 196 (65.6) | |
| I | 57(6.4) | 38 (6.4) | 19 (6.4) | |
| II | 127(14.2) | 82 (13.7) | 45 (15.1) | |
| III | 120(13.4) | 84(14) | 36(12.0) | |
| IV | 10(1.1) | 7(1.2) | 3(1.0) | |
| T stage | 0.889 | |||
| T1 | 236(26.3) | 156(26.1) | 80(26.8) | |
| T2 | 114(12.7) | 79(13.2) | 35(11.7) | |
| T3 | 408(45.5) | 273(45.7) | 135(45.2) | |
| T4 | 139(15.5) | 90 (15.1) | 49(16.4) | |
| N stage | 0.660 | |||
| N0 | 679(75.7) | 450 (75.3) | 229(76.6) | |
| N1 | 218(24.3) | 148 (24.7) | 70(23.4) | |
| Bone metastasis | 0.949 | |||
| None | 754(84.1) | 503 (84.1) | 251(83.9) | |
| Yes | 143(15.9) | 95 (15.9) | 48(16.1) | |
| Brain metastasis | 1 | |||
| None | 879(98.0) | 586 (98.0) | 293(98.0) | |
| Yes | 18(0.2) | 12 (0.02) | 6(0.02) | |
| Intrahepatic metastasis | 0.397 | |||
| None | 821(91.5) | 544 (91.0) | 277(92.6) | |
| Yes | 76(8.5) | 54 (9.0) | 22(7.4) | |
| AFP | 0.219 | |||
| Unknown | 121(13.5) | 89 (14.9) | 32(10.7) | |
| Elevated | 680(75.8) | 447 (74.7) | 233(77.9) | |
| Normal | 96(10.7) | 62 (10.4) | 34(11.4) | |
| Insurance status | 0.962 | |||
| Uninsured | 367(40.9) | 245 (41.0) | 122(40.8) | |
| Insured | 530(59.1) | 353 (59.0) | 177(59.2) | |
| Marital status | 0.129 | |||
| Unmarried | 401(44.7) | 278 (46.5) | 123(41.1) | |
| Married | 496(55.3) | 320 (53.5) | 176(58.9) |
Note: ✱✱Indicates American Indian/AK Native, Asian/Pacific Islander, and unknown.
Abbreviation: AFP, alpha fetoprotein.