Table 1.
Baseline Characteristics of T3N0M0 patients diagnosed in 2000–2015 from the SEER database.
| Characteristics | Total (n = 4840) n (%) | 18–45 (n = 1004) n (%) | 46–55 (n = 1176) n (%) | 56–65 (n = 1007) n (%) | >65 (n = 1653) n (%) | P |
|---|---|---|---|---|---|---|
| Year | 0.004 | |||||
| 2000–2009 | 2457(50.76) | 530(52.79) | 602(51.19) | 461(45.78) | 864(52.27) | |
| 2010–2015 | 2383(49.24) | 474(47.21) | 574(48.81) | 546(54.22) | 789(47.73) | |
| Race | <0.001 | |||||
| White | 3665(75.72) | 688(68.53) | 880(74.83) | 776(77.06) | 1321(79.92) | |
| Black | 746(15.41) | 206(20.52) | 179(15.22) | 148(14.70) | 213(12.89) | |
| Others | 429(8.86) | 110(10.96) | 117(9.95) | 83(8.24) | 119(7.20) | |
| Marital status | <0.001 | |||||
| Married | 2452(50.66) | 588(58.57) | 688(58.50) | 531(52.73) | 645(39.02) | |
| Not married | 2388(49.34) | 416(41.43) | 488(41.50) | 476(47.27) | 1008(60.98) | |
| Laterality | 0.499 | |||||
| Left | 2416(49.92) | 500(49.80) | 581(49.40) | 487(48.36) | 848(51.30) | |
| Right | 2424(50.08) | 504(50.20) | 595(50.60) | 520(51.64) | 805(48.70) | |
| Histology | <0.001 | |||||
| IDC | 2702(55.83) | 724(72.11) | 695(59.10) | 540(53.62) | 743(44.95) | |
| ILC and others | 2138(44.17) | 280(27.89) | 481(40.90) | 467(46.38) | 910(55.05) | |
| Grade | <0.001 | |||||
| I and II | 2477(51.18) | 375(37.35) | 584(49.66) | 537(53.33) | 981(59.35) | |
| III and others | 2363(48.82) | 629(62.65) | 592(50.34) | 470(46.67) | 672(40.65) | |
| Tumor size | 0.002 | |||||
| 5–6 cm | 1799(37.17) | 373(37.15) | 439(37.33) | 365(36.25) | 622(37.63) | |
| 6–8 cm | 1426(29.46) | 288(28.69) | 338(28.74) | 319(31.68) | 481(29.10) | |
| >8 cm | 732(15.12) | 151(15.04) | 207(17.60) | 164(16.29) | 210(12.70) | |
| Others/Unknown | 883(18.24) | 192(19.12) | 192(16.33) | 159(15.79) | 340(20.57) | |
| HoR | <0.001 | |||||
| Negative | 1555(32.13) | 409(40.74) | 430(36.56) | 304(30.19) | 412(24.92) | |
| Positive | 3285(67.87) | 595(59.26) | 746(63.44) | 703(69.81) | 1241(75.08) | |
| Chemotherapy | <0.001 | |||||
| Yes | 2880(59.50) | 154(15.34) | 268(22.79) | 331(32.87) | 1207(73.02) | |
| No/Unknown | 1960(40.50) | 850(84.66) | 908(77.21) | 676(67.13) | 446(26.98) | |
| Radiation | <0.001 | |||||
| Yes | 2243(46.34) | 416(41.43) | 570(48.47) | 512(50.84) | 1099(66.49) | |
| No | 2597(53.66) | 588(58.57) | 606(51.53) | 495(49.16) | 554(33.51) |
Abbreviations: HoR, hormone receptor; IDC, infiltrating duct carcinoma; ILC, infiltrating lobular carcinoma.