Table 1.
Patients characteristics by gender after propensity score matching.
| Characteristic | No. of Patients (%) | P | |
|---|---|---|---|
| MBC (1,111) | FBC (2,151) | ||
| Year of diagnosis | |||
| 1998–2000 | 186 (16.7) | 345 (16.0) | 0.753 |
| 2001–2003 | 332 (29.9) | 629 (29.2) | |
| 2004–2007 | 593 (53.4) | 1,177 (54.7) | |
| Age, years | |||
| <40 | 25 (2.3) | 40 (1.9) | 0.985 |
| 40–49 | 116 (10.4) | 225 (10.5) | |
| 50–59 | 260 (23.4) | 512 (23.8) | |
| 60–69 | 302 (27.2) | 590 (27.4) | |
| 70–79 | 244 (22.0) | 466 (21.7) | |
| >80 | 164 (14.8) | 318 (14.8) | |
| Race/ethnic | |||
| White | 953 (85.8) | 1,867 (86.8) | 0.419 |
| Black | 103 (9.3) | 171 (7.9) | |
| Othera | 55 (5.0) | 113 (5.3) | |
| Marital status | |||
| Single | 292 (26.3) | 554 (25.8) | 0.745 |
| Married | 819 (73.7) | 1,597 (74.2) | |
| AJCC T stage | |||
| T1mic | 35 (3.2) | 58 (2.7) | 0.965 |
| T1a | 34 (3.1) | 66 (3.1) | |
| T1b | 104 (9.4) | 206 (9.6) | |
| T1c | 467 (42.0) | 903 (42.0) | |
| T2 | 471 (42.4) | 918 (42.7) | |
| AJCC N stage | |||
| N0 | 661 (59.5) | 1,295 (60.2) | 0.881 |
| N1 | 366 (32.9) | 690 (32.1) | |
| N2 | 84 (7.6) | 166 (7.7) | |
| Histological | |||
| Ductal | 943 (84.9) | 1,536 (71.4) | <0.001 |
| Lobular | 7 (0.6) | 213 (9.9) | |
| Other | 161 (14.5) | 402 (18.7) | |
| Grade | |||
| I | 171 (15.4) | 316 (14.7) | 0.833 |
| II | 569 (51.2) | 1,121 (52.1) | |
| III | 371 (33.4) | 714 (33.2) | |
| ER | |||
| Negative | 49 (4.4) | 110 (5.1) | 0.377 |
| Positive | 1,062 (95.6) | 2,041 (94.9) | |
| PR | |||
| Negative | 171 (15.4) | 330 (15.3) | 0.970 |
| Positive | 940 (84.6) | 1821 (84.7) | |
| Chemotherapy | |||
| No | 684 (61.6) | 1,318 (61.3) | 0.871 |
| Yes | 427 (38.4) | 883 (38.7) | |
| Radiotherapy | |||
| No | 846 (76.1) | 1,642 (76.3) | 0.904 |
| Yes | 265 (23.9) | 509 (23.7) | |
| Surgery | |||
| No | 8 (0.7) | 8 (0.4) | 0.370 |
| BCS | 129 (11.6) | 261 (12.1) | |
| Mastectomy | 974 (87.7) | 1,882 (87.5) | |
aAmerican Indian/AK Native, Asian/Pacific Islander.
Abbreviations: MBC, male breast cancer; FBC, female breast cancer; AJCC, American Joint Committee on Cancer system; ER, estrogen-receptor; PR, progesterone receptor; BCS, breast conserving surgery.