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Table 2 Distribution of HRT use among sporadic breast cancer cases

From: KRAS rs61764370 is associated with HER2-overexpressed and poorly-differentiated breast cancer in hormone replacement therapy users: a case control study

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
  1. * Among those who ever used HRT