Factors
Entire cohort (n=806) Entire cohort (n=806) Training cohort (n=566) Training cohort (n=566) Validation cohort (n=240) Validation cohort (n=240)
N % N % N %
Age at diagnosis, years Age at diagnosis, years Age at diagnosis, years Age at diagnosis, years Age at diagnosis, years Age at diagnosis, years Age at diagnosis, years
Median 6 6 6 6 6 6
Range 0-12 0-12 0-12 0-12 0-12 0-12
Race
White 596 74.0 426 75.3 170 70.8
Black 138 17.1 101 17.8 37 15.4
Other 72 8.9 39 6.9 33 13.8
Sex
Male 389 48.3 278 49.1 111 46.2
Female 417 51.7 288 50.9 129 53.8
YOD
1998-2008 457 56.7 311 54.9 146 60.8
2009-2016 349 43.3 255 45.1 94 39.2
Tumor size, diameter, cm
≤3 87 10.8 54 9.5 33 13.8
>3 265 32.9 197 34.8 68 28.3
Unknown 454 56.3 315 55.7 139 57.9
Histologic grade
Well 10 1.24 8 1.4 2 0.8
Moderately 25 3.1 17 3 8 3.3
Poorly 10 1.24 7 1.24 3 1.3
Undifferentiated 22 2.73 16 2.8 6 2.5
Unknown 739 91.7 518 91.5 221 92.1
Stage
Localized 720 89.3 506 89.4 214 89.2
Regional 76 9.4 51 9.0 25 10.4
Distant 10 1.2 9 1.6 1 0.4
Surgery
None 781 96.9 551 97.3 230 95.8
Yes 25 3.1 15 2.7 10 4.2
Radiotherapy
None 239 29.6 169 29.9 70 29.2
Yes 567 70.4 397 70.1 170 70.8
Chemotherapy
None 446 55.3 310 54.8 136 56.7
Yes 360 44.7 256 45.2 104 43.3
Median Follow-up (Months) 11 11 11 11 11 11