Table 2.
Characteristics of women with breast cancer stratified by receiving hormone therapy
| Variable | Hormone therapy | No hormone therapy | P‐value |
|---|---|---|---|
| n = 2,812 | n = 1,795 | ||
| Age group | |||
| Mean (SD) | 59.0 (9.2) | 57.8 (8.8) | <0.001 |
| 55–65 years | 2,216 (78.8) | 1,498 (83.4) | <0.001 |
| 66–80 years | 522 (18.6) | 260 (14.5) | |
| ≥81 years | 74 (2.6) | 37 (2.1) | |
| Income | |||
| <1,249 | 826 (29.4) | 565 (31.5) | 0.299 |
| 1,249–21,899 | 853 (30.3) | 536 (29.9) | |
| ≥21,900 | 1,133 (40.3) | 694 (38.7) | |
| Urbanization† | |||
| I (1) | 994 (35.4) | 634 (35.3) | 0.877 |
| II (2 + 3) | 1,046 (37.2) | 678 (37.8) | |
| III (4 + 5) | 336 (12.0) | 221 (12.3) | |
| IV (6 + 7) | 133 (4.7) | 74 (4.1) | |
| Missing | 303 (10.8) | 188 (10.5) | |
| Cancer stage | |||
| 1 | 767 (35.3) | 356 (32.5) | 0.087 |
| 2 | 896 (41.3) | 448 (41.0) | |
| 3 | 392 (18.1) | 236 (21.6) | |
| 4 | 116 (5.3) | 54 (4.9) | |
| Charlson Comorbidity Index | |||
| Mean (SD) | 0.7 (1.6) | 0.5 (1.2) | <0.001 |
| >1 | 446 (15.9) | 246 (13.7) | 0.046 |
| History of hyperlipidemia | 316 (11.2) | 161 (9.0) | 0.014 |
| History of hypertension | 773 (27.5) | 404 (22.5) | <0.001 |
| History of cardiovascular disease | 186 (6.6) | 115 (6.4) | 0.781 |
| History of chronic kidney disease | 15 (0.5) | 10 (0.6) | 0.915 |
| History of cerebrovascular disease | 100 (3.6) | 55 (3.1) | 0.366 |
| Received treatment within 1 year after index date | |||
| Surgery | 2,710 (96.4) | 1,293 (72.0) | <0.001 |
| Chemotherapy | 1,732 (61.6) | 848 (47.2) | <0.001 |
| Median follow‐up period, years (IQR) | 3.1 (0.1–6.8) | 4.1 (1.0–8.5) | <0.001 |
Data are presented as mean ± standard deviation (SD), number (percentage) or median (interquartile range [IQR]). †Patients were divided into four subgroups according to the level of urbanization where they resided: I (1): highly urbanized cities; II (2 + 3): moderately urbanized cities plus boom towns; III (4 + 5): general cities and towns plus aging towns; IV (6 + 7): suburbanized cities and towns plus remote towns.