Factors | Training cohort (n = 8058) | % | Validation cohort (n = 3454) | % | Total (n = 11512) | % | P |
---|---|---|---|---|---|---|---|
Age1 | 70.20 ± 11.61 | 70.68 ± 11.92 | 70.35 ± 11.71 | 0.04 | |||
Sex | Â | Â | Â | Â | Â | Â | 0.07 |
 Male | 6322 | 78.46 | 2658 | 76.95 | 8980 | 78.01 |  |
 Female | 1736 | 21.54 | 796 | 23.05 | 2532 | 21.99 |  |
Grade | Â | Â | Â | Â | Â | Â | 0.99 |
 Well | 309 | 3.83 | 134 | 3.88 | 443 | 3.85 |  |
 Moderately | 1059 | 13.14 | 455 | 13.17 | 1514 | 13.15 |  |
 Poorly | 1735 | 21.53 | 738 | 21.37 | 2473 | 21.48 |  |
 Undifferentiated | 4955 | 61.49 | 2127 | 61.58 | 7082 | 61.52 |  |
Ethnic group | Â | Â | Â | Â | Â | Â | 0.97 |
 White | 7171 | 88.99 | 3069 | 88.85 | 10240 | 88.95 |  |
 Black | 458 | 5.68 | 198 | 5.73 | 656 | 5.70 |  |
 Other | 429 | 5.32 | 187 | 5.41 | 616 | 5.35 |  |
Marital status | Â | Â | Â | Â | Â | Â | 0.06 |
 Married | 5098 | 63.27 | 2111 | 61.12 | 7209 | 62.62 |  |
 Single | 1025 | 12.72 | 446 | 12.91 | 1471 | 12.78 |  |
 SDW | 1935 | 24.01 | 897 | 25.97 | 2832 | 24.60 |  |
Insurance | Â | Â | Â | Â | Â | Â | 0.41 |
 Yes | 7789 | 96.66 | 3349 | 96.96 | 11138 | 96.75 |  |
 No | 269 | 3.34 | 105 | 3.04 | 374 | 3.25 |  |
Location | Â | Â | Â | Â | Â | Â | 0.19 |
 Urachus/dome | 303 | 3.76 | 140 | 4.05 | 443 | 3.85 |  |
 Trigone, neck, ureteric orifice | 951 | 11.80 | 365 | 10.57 | 1316 | 11.43 |  |
 Wall | 2920 | 36.24 | 1294 | 37.46 | 4214 | 36.61 |  |
 NOS/overlap | 3884 | 48.20 | 1655 | 47.92 | 5539 | 48.12 |  |
Stage | Â | Â | Â | Â | Â | Â | 0.82 |
 Localized | 6782 | 84.16 | 2906 | 84.13 | 9688 | 84.16 |  |
 Regional | 953 | 11.83 | 417 | 12.07 | 1370 | 11.90 |  |
 Distant | 323 | 4.01 | 131 | 3.79 | 454 | 3.94 |  |
AJCC | Â | Â | Â | Â | Â | Â | 0.41 |
 I | 5214 | 64.71 | 2247 | 65.06 | 7461 | 64.81 |  |
 II | 1627 | 20.19 | 685 | 19.83 | 2312 | 20.08 |  |
 III | 499 | 6.19 | 236 | 6.83 | 735 | 6.38 |  |
 IV | 718 | 8.91 | 286 | 8.28 | 1004 | 8.72 |  |
Size | Â | Â | Â | Â | Â | Â | 0.26 |
 1-20 mm | 1647 | 20.44 | 746 | 21.60 | 2393 | 20.79 |  |
 21-49 mm | 3650 | 45.30 | 1516 | 43.89 | 5166 | 44.87 |  |
 ≥ 50 mm | 2761 | 34.26 | 1192 | 34.51 | 3953 | 34.34 |  |
Regional lymph nodes removed | Â | Â | Â | Â | Â | Â | 0.22 |
 Yes | 1574 | 19.53 | 641 | 18.56 | 2215 | 19.24 |  |
 No | 6484 | 80.47 | 2813 | 81.44 | 9297 | 80.76 |  |
Chemotherapy | Â | Â | Â | Â | Â | Â | 0.45 |
 Yes | 2652 | 32.91 | 1162 | 33.64 | 3814 | 33.13 |  |
 No | 5406 | 67.09 | 2292 | 66.36 | 7698 | 66.87 |  |
Radiation | Â | Â | Â | Â | Â | Â | 0.42 |
 Yes | 493 | 6.12 | 225 | 6.51 | 718 | 6.24 |  |
 No | 7565 | 93.88 | 3229 | 93.49 | 10794 | 93.76 |  |