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Distribution of HRT use among sporadic breast cancer cases
| Patients characteristics | Sporadic breast cancer cases N (%) | |
|---|---|---|
| HRT use | ||
| Nonusers: 0 < 1 years | 373 (70.4) | |
| Short-term users: 1 < 5 years | 76 (14.3) | |
| Long-term users: ≥ 5 years | 81 (15.3) | |
| Missing | 0 | |
| Regimen of HRT* | ||
| Estrogen only | 53 (28.8) | |
| Estrogen plus progestin | 131 (71.2) | |
| Missing | 2 |
* Among those who ever used HRT
