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. 2024 Sep 4;26:e56022. doi: 10.2196/56022

Table 1.

Patient demographics, tumor characteristics, and treatment details.


Overall
(N=3577)
Training
(n=2503)
Validation
(n=1074)
Recurrence within 5 years, n (%)

No 3152 (88.1) 2208 (88.2) 944 (87.9)

Yes 425 (11.9) 295 (11.8) 130 (12.1)
Age (years), mean (SD) 52.97 (11.29) 52.99 (11.18) 52.92 (11.55)
Estrogen receptor status, n (%)

Negative 799 (22.3) 569 (22.7) 230 (21.4)

Positive 2778 (77.7) 1934 (77.3) 844 (78.6)
Progesterone receptor status, n (%)

Negative 658 (18.4) 470 (18.8) 188 (17.5)

Positive 2919 (81.6) 2033 (81.2) 886 (82.5)
Estrogen receptor intensity, n (%)

0 799 (22.3) 569 (22.7) 230 (21.4)

1 216 (6.0) 140 (5.6) 76 (7.1)

2 1789 (50.01) 1263 (50.5) 526 (48.98)

3 773 (21.6) 531 (21.2) 242 (22.5)
Progesterone receptor intensity, n (%)

0 656 (18.3) 468 (18.7) 188 (17.5)

1 492 (13.8) 341 (13.6) 151 (14.1)

2 1887 (52.8) 1327 (53.01) 560 (52.1)

3 542 (15.2) 367 (14.7) 175 (16.3)
Pathological stage, n (%)

Stage 0 997 (27.9) 707 (28.2%) 290 (27.0)

Stage 1 1097 (30.7) 750 (30.0) 347 (32.3)

Stage 2 1036 (28.96) 731 (29.2%) 305 (28.4)

Stage 3 395 (11.04) 278 (11.1) 117 (10.9)

Stage 4 52 (1.5) 37 (1.5) 15 (1.4)
Tumor size, n (%)

T0 1003 (28.04) 711 (28.4) 292 (27.2)

T1 1432 (40.03) 985 (39.4) 447 (41.6)

T2 964 (26.9) 683 (27.3) 281 (26.2)

T3 122 (3.4) 86 (3.4) 36 (3.4)

T4 56 (1.6) 38 (1.5) 18 (1.7)
Nodal involvement, n (%)

N0 2646 (73.97) 1834 (73.3) 812 (75.6)

N1 574 (16.04) 419 (16.7) 155 (14.4)

N2 231 (6.5) 162 (6.5) 69 (6.4)

N3 126 (3.5) 88 (3.5) 38 (3.5)
Metastasis, n (%)

M0 3541 (98.99) 2475 (98.9) 1066 (99.3)

M1 36 (1.01) 28 (1.1) 8 (0.7)
Treatment details

Surgery type


Breast-conserving surgery 1363 (38.1) 966 (38.6) 397 (36.96)


Modified radical mastectomy 2214 (61.9) 1537 (61.4) 677 (63.03)

Antiestrogen therapy


No 1382 (38.6) 978 (39.1) 404 (37.6)


Yes 2195 (61.4) 1525 (60.9) 670 (62.4)

Aromatase inhibitor usage


No 2314 (64.7) 1608 (64.2) 706 (65.7)


Yes 1263 (35.3) 895 (35.8) 368 (34.3)

Chemotherapy


No 897 (25.1) 607 (24.3) 290 (27)


Yes 2680 (74.9) 1896 (75.7) 784 (73.0)

Radiotherapy


No 1910 (53.4) 1326 (52.98) 584 (54.4)


Yes 1667 (46.6) 1177 (47.02) 490 (45.6)