Table 1 Basic characteristics of all TNBC patients [n(%)]
Variable | Group | All patients (n = 13,262) | BCS + RT (n = 6116) | Mastectomy alone (n = 4483) | Mastectomy+RT (n = 2663) | χ2 | P |
|---|---|---|---|---|---|---|---|
Age | < 45 | 3067(23.13) | 918(15.01) | 1312(29.27) | 837(31.43) | 507.07 | 0.000 |
45 ~ 54 | 3854(29.06) | 1748(28.58) | 1326(29.58) | 780(29.29) |  |  | |
55 ~ 64 | 3637(27.42) | 1973(32.26) | 1039(23.18) | 625(23.47) |  |  | |
≥65 | 2704(20.39) | 1477(24.15) | 806(17.98) | 421(15.81) |  |  | |
Ethnicity | White | 9392(70.82) | 4279(69.96) | 3295(73.50) | 1818(68.27) | 59.70 | 0.000 |
Black | 2855(21.53) | 1426(23.32) | 807(18.00) | 622(23.36) | Â | Â | |
Others a | 1015(7.65) | 411(6.72) | 381(8.50) | 223(8.37) | Â | Â | |
Marital status | non-Married b | 5169(38.98) | 2332(38.13) | 1763(39.33) | 1074(40.33) | 4.13 | 0.127 |
Married | 8093(61.02) | 3784(61.87) | 2720(60.67) | 1589(59.67) | Â | Â | |
Laterality | Left | 6767(51.03) | 3188(52.13) | 2243(50.03) | 1336(50.17) | 5.51 | 0.064 |
Right | 6495(48.97) | 2928(47.87) | 2240(49.97) | 1327(49.83) | Â | Â | |
Primary tumor Site | Central portion | 407(3.07) | 120(1.96) | 156(3.48) | 131(4.92) | 375.59 | 0.000 |
Upper-inner quadrant | 1864(14.06) | 950(15.53) | 656(14.63) | 258(9.69) | Â | Â | |
Lower-inner quadrant | 808(6.09) | 405(6.62) | 278(6.20) | 125(4.69) | Â | Â | |
Upper-outer quadrant | 5222(39.38) | 2555(41.78) | 1634(36.45) | 1033(38.79) | Â | Â | |
Lower-outer quadrant | 936(7.06) | 426(6.97) | 325(7.25) | 185(6.95) | Â | Â | |
Axillary tail | 96(0.72) | 54(0.88) | 26(0.58) | 16(0.60) | Â | Â | |
Overlapping lesion | 2919(22.01) | 1366(22.33) | 990(22.08) | 563(21.14) | Â | Â | |
Others c | 1010(7.62) | 240(3.92) | 418(9.32) | 352(13.22) | Â | Â | |
Grade | I/II | 1813(13.67) | 874(14.29) | 629(14.03) | 310(11.64) | 11.78 | 0.003 |
III/IV | 11,449(86.33) | 5242(85.71) | 3854(85.97) | 2353(88.36) | Â | Â | |
Tumor size | T1 | 5328(40.17) | 3222(52.68) | 1685(37.59) | 421(15.81) | 2086.50 | 0.000 |
T2 | 6138(46.28) | 2629(42.99) | 2231(49.77) | 1278(47.99) | Â | Â | |
T3 | 1216(9.17) | 218(3.56) | 381(8.50) | 617(23.17) | Â | Â | |
T4 | 580(4.37) | 47(0.77) | 186(4.15) | 347(13.03) | Â | Â | |
Lymph node status | N0 | 8095(61.04) | 4500(73.58) | 3041(67.83) | 554(20.80) | 2575.07 | 0.000 |
N1 | 3619(27.29) | 1284(20.99) | 1070(23.87) | 1265(47.50) | Â | Â | |
N2 | 937(7.07) | 226(3.70) | 217(4.84) | 494(18.55) | Â | Â | |
N3 | 611(4.61) | 106(1.73) | 155(3.46) | 350(13.14) | Â | Â |