Table 1 Epidemiological characteristics of the study participants
From: Clinical and genetic characterization of hereditary breast cancer in a Chinese population
Variable | No (BC) (%)(n = 120) | No (high-risk group) (%)(n = 120) | P-Value |
|---|---|---|---|
The median age at sample collection (Range) | 46(25–81) | 37(18–77) |  |
BMI(kg/m2) | Â | Â | 0.095 |
  < 25 | 79(65.8) | 93(77.5) |  |
 ≥25 | 24(20.0) | 13(10.8) |  |
 Unknown | 17(14.2) | 14(11.7) |  |
Age at menarche(in years) | Â | Â | 0.815 |
  < 13 | 21(17.5) | 24(20.0) |  |
 ≥13 | 76(63.3) | 76(63.3) |  |
 Unknown | 23(19.2) | 20(16.7) |  |
Parity | Â | Â | 0.005 |
 Nulliparous | 93(77.5) | 80(66.7) |  |
 Parous | 7(5.8) | 24(20.0) |  |
 Unknown | 20(16.7) | 16(13.3) |  |
Breast-feeding history | Â | Â | 0.094 |
 Yes | 65(54.2) | 50(41.7) |  |
 No | 18(15.0) | 29(24.2) |  |
 Unknown | 37(30.8) | 41(34.2) |  |
Abortion | Â | Â | 0.017 |
 Yes | 50(41.7) | 33(27.5) |  |
 No | 50(41.7) | 72(60.0) |  |
 Unknown | 20(16.6) | 15(12.5) |  |