Table 1. Comparison of descriptive characteristics of the modeling and validation groups for the L-2-ALNM nomogram.
Variables | Modeling No. (%) | Validation No. (%) | P-value |
---|---|---|---|
No. of Patients | 568 (100%) | 141 (100%) | |
L-2-ALNM | 0.731 | ||
Yes | 149 (26.2) | 39 (27.7) | |
No | 419 (73.8) | 102 (72.3) | |
Age (year) | 0.764 | ||
≤45 | 148(80.9) | 420(79.8) | |
>45 | 35(18.1) | 106(20.2) | |
Menopausal status | 0.090 | ||
Premenopausal | 319(56.2) | 68(48.2) | |
Postmenopausal | 249(43.8) | 73(51.8) | |
Tumor size (cm) Median (range) |
3.5 (1.6-9.8) | 3.5 (1.7-11.0) | 0.688 |
Histological grade | 0.255 | ||
Ⅰ | 17 (3.0) | 1(0.7) | |
Ⅱ | 491(86.4) | 127 (90.7) | |
Ⅲ | 60 (10.6) | 12(8.6) | |
ER status | 0.741 | ||
Positive | 363(63.9) | 88(62.4) | |
Negative | 205(36.1) | 53(37.6) | |
PrR status | 0.001 | ||
Positive | 309(54.4) | 54 (38.3) | |
Negative | 259(45.6) | 87(61.7) | |
Her-2 status | 0.105 | ||
Positive | 110(19.4) | 19(13.5) | |
Negative | 458(80.6) | 122(86.5) | |
Ki-67 status | 0.466 | ||
≤20 | 393 (69.2) | 102 (72.3) | |
>20 | 175 (30.8) | 39 (27.7) | |
(ER/PrR) status | 0.570 | ||
Positive | 373 (65.7) | 89(63.1) | |
Negative | 195 (34.3) | 52(36.9) | |
Skin invasion | 0.888 | ||
Yes | 74 (13.0) | 19 (13.5) | |
No | 494 (87.0) | 122 (86.5) | |
Rresponse to NAC | 0.260 | ||
PD | 12 (2.1) | 4 (2.8) | |
SD | 173(30.5) | 33(23.4) | |
PR | 340(59.9) | 89(63.1) | |
CR | 43 (7.6) | 141(10.6) | |
Cycles of NAC Median (range) |
4 (2-6) | 4 (2-6) | 0.053 |
Tumor location | 0.029 | ||
UOQ | 364 (64.1) | 76 (53.9) | |
LOQ | 34 (6.0) | 10 (7.1) | |
LIQ | 18 (3.2) | 6 (4.3) | |
UIQ | 108 (18.5) | 25 (17.7) | |
Central | 47 (8.3) | 24 (17.0) |
Comparison between the modeling group and validation group by clinicopathological characteristics. Abbreviations:UOQ, upper outer quadrant; UIQ, upper inner quadrant; LOQ, lower outer quadrant; LIQ, lower inner quadrant; L-2-ALNM, level 2 axillary lymph node metastasis; NAC, neoadjuvant chemotherapy; PD, progressive disease; SD, stable disease; PR, partial remission; CR, complete remission.