Table 1.
Demographic characteristics of patients by molecular subtypes
| Variables | All cases | Luminal A | Luminal B | HER2‐enriched | Basal‐like | P value |
|---|---|---|---|---|---|---|
| (n = 8067, %) | (n = 4881, %) | (n = 1296, %) | (n = 1327, %) | (n = 563, %) | ||
| Age | ||||||
| Mean ± SD (years) | 52.3 ± 10.7 | 52.9 ± 11.0 | 49.9 ± 9.9 | 52.4 ± 10.1 | 52.6 ± 10.8 | <0.001 |
| Marriage | ||||||
| Single | 99 (1.2) | 61 (1.3) | 19 (1.5) | 13 (1.0) | 6 (1.1) | 0.028 |
| Married | 7508 (93.6) | 4501 (92.9) | 1220 (94.5) | 1259 (95.1) | 528 (94.3) | |
| Separated/divorce/widowed | 414 (5.2) | 284 (5.9) | 52 (4.0) | 52 (3.9) | 26 (4.6) | |
| Education | ||||||
| No education | 423 (6.1) | 247 (6.0) | 56 (4.9) | 87 (7.5) | 33 (6.5) | 0.771 |
| Primary school | 1013 (14.6) | 600 (14.5) | 165 (14.6) | 167 (14.4) | 80 (15.8) | |
| Junior high school | 2282 (32.8) | 1357 (32.7) | 383 (33.7) | 380 (32.8) | 162 (32.0) | |
| Senior high school | 2309 (33.2) | 1392 (33.6) | 377 (33.2) | 374 (32.3) | 166 (32.7) | |
| Junior college or above | 922 (13.3) | 552 (13.3) | 153 (13.5) | 151 (13.0) | 66 (13.0) | |
| Average monthly income per person (RMB) | ||||||
| <500 | 262 (3.5) | 190 (4.2) | 33 (2.7) | 26 (2.1) | 13 (2.5) | <0.001 |
| 500‐999 | 1100 (14.8) | 679 (15.1) | 192 (15.9) | 153 (12.6) | 76 (14.4) | |
| 1000‐1999 | 3265 (43.8) | 1908 (42.4) | 539 (44.6) | 580 (47.6) | 238 (45.1) | |
| 2000‐2999 | 1801 (24.2) | 1082 (24.1) | 296 (24.5) | 283 (23.2) | 140 (26.5) | |
| ≥3000 | 1024 (13.7) | 639 (14.2) | 148 (12.3) | 176 (14.4) | 61 (11.6) | |
| Current occupations | ||||||
| Yes | 3781 (48.3) | 2194 (46.5) | 690 (54.5) | 634 (48.8) | 263 (47.7) | <0.001 |
| No | 4055 (51.7) | 2526 (53.5) | 576 (45.5) | 665 (51.2) | 288 (52.3) | |
| Age at first marriage (years) | ||||||
| <30 | 7554 (95.3) | 4546 (94.8) | 1221 (96.2) | 1248 (95.2) | 539 (97.1) | 0.029 |
| ≥30 | 376 (4.7) | 249 (5.2) | 48 (3.8) | 63 (4.8) | 16 (2.9) | |
HER2, human epidermal growth factor receptor 2.