Table 1 Comparison of baseline data of training set, internal test set

Sex:

 1

2619 (30.40%)

1845 (30.59%)

774 (29.95%)

 2

5996 (69.60%)

4186 (69.41%)

1810 (70.05%)

Race_recode:

 1

6640 (77.07%)

4655 (77.18%)

1985 (76.82%)

 2

1006 (11.68%)

698 (11.57%)

308 (11.92%)

 3

969 (11.25%)

678 (11.24%)

291 (11.26%)

 Age

69.64 ± 12.52

69.66 ± 12.53

69.60 ± 12.52

Grade_Recode:

 1

1230 (14.28%)

845 (14.01%)

385 (14.90%)

 2

3589 (41.66%)

2513 (41.67%)

1076 (41.64%)

 3

3558 (41.30%)

2516 (41.72%)

1042 (40.33%)

 4

238 (2.76%)

157 (2.60%)

81 (3.13%)

Marital_status:

 1

1246 (14.46%)

906 (15.02%)

340 (13.16%)

 2

4506 (52.30%)

3127 (51.85%)

1379 (53.37%)

 3

2863 (33.23%)

1998 (33.13%)

865 (33.48%)

Surgery_Recode:

 1

1098 (12.75%)

772 (12.80%)

326 (12.62%)

 2

7516 (87.24%)

5258 (87.18%)

2258 (87.38%)

Radiation_recode:

 1

7183 (83.38%)

5027 (83.35%)

2156 (83.44%)

 2

1432 (16.62%)

1004 (16.65%)

428 (16.56%)

Chemotherapy_recode:

 1

5525 (64.13%)

3874 (64.23%)

1651 (63.89%)

 2

3090 (35.87%)

2157 (35.77%)

933 (36.11%)

Diagnostic_Confirmation:

 1

8513 (98.82%)

5966 (98.92%)

2547 (98.57%)

 2

98 (1.14%)

62 (1.03%)

36 (1.39%)

 3

3 (0.03%)

2 (0.03%)

1 (0.04%)

 4

1 (0.01%)

1 (0.02%)

0 (0.00%)

Histology_recode:

 1

7426 (86.20%)

5209 (86.37%)

2217 (85.80%)

 2

280 (3.25%)

187 (3.10%)

93 (3.60%)

 3

484 (5.62%)

340 (5.64%)

144 (5.57%)

 4

425 (4.93%)

295 (4.89%)

130 (5.03%)

Median_household_income_inflation_adj_to_2021:

 1

879 (10.20%)

609 (10.10%)

270 (10.45%)

 2

1152 (13.37%)

824 (13.66%)

328 (12.69%)

 3

2571 (29.84%)

1794 (29.75%)

777 (30.07%)

 4

4013 (46.58%)

2804 (46.49%)

1209 (46.79%)

Rural_Urban_Continuum_Code:

 1

659 (7.65%)

458 (7.59%)

201 (7.78%)

 2

1668 (19.36%)

1180 (19.57%)

488 (18.89%)

 3

5358 (62.19%)

3750 (62.18%)

1608 (62.23%)

 4

930 (10.80%)

643 (10.66%)

287 (11.11%)

Record_number_recode:

 1

7443 (86.40%)

5203 (86.27%)

2240 (86.69%)

 2

1010 (11.72%)

718 (11.91%)

292 (11.30%)

 3

136 (1.58%)

92 (1.53%)

44 (1.70%)

 4

23 (0.27%)

15 (0.25%)

8 (0.31%)

 5

3 (0.03%)

3 (0.05%)

0 (0.00%)

T:

 0

4932 (57.25%)

3463 (57.42%)

1469 (56.85%)

 1

434 (5.04%)

303 (5.02%)

131 (5.07%)

 2

1491 (17.31%)

1037 (17.19%)

454 (17.57%)

 3

1502 (17.43%)

1049 (17.39%)

453 (17.53%)

 4

141 (1.64%)

103 (1.71%)

38 (1.47%)

 X

115 (1.33%)

76 (1.26%)

39 (1.51%)

N:

 0

7295 (84.68%)

5109 (84.71%)

2186 (84.60%)

 1

960 (11.14%)

675 (11.19%)

285 (11.03%)

 2

157 (1.82%)

102 (1.69%)

55 (2.13%)

 X

203 (2.36%)

145 (2.40%)

58 (2.24%)

M:

 0

7611 (88.35%)

5340 (88.54%)

2271 (87.89%)

 1

1004 (11.65%)

691 (11.46%)

313 (12.11%)

COD:

 0

1496 (17.37%)

1050 (17.41%)

446 (17.26%)

 1

7119 (82.63%)

4981 (82.59%)

2138 (82.74%)

Survival_months

28.34 ± 38.75

28.36 ± 38.46

28.30 ± 39.41