Evid Based Nurs 5:89 doi:10.1136/ebn.5.3.89
  • Causation

Review: breast cancer is associated with a family history of the disease in first degree relatives

Table 1

Relative risk (RR) for breast cancer by number of affected first degree female relatives

Number of first degree relatives RR for women <50 years (95% CI) RR for women ≥ 50 years (CI)
1 2.14 (1.92 to 2.38) 1.65 (1.53 to 1.78)
2 3.84 (2.37 to 6.22) 2.61 (2.03 to 3.34)
3 12.05 (1.70 to 85.16) 2.65 (1.29 to 5.46)

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