Prediction of breast cancer risk for sisters of women attending screening
Menée à partir des données d'une étude suédoise portant sur 53 051 femmes, cette étude identifie les facteurs communs permettant de prédire le risque de cancer du sein chez des soeurs
Background : Risk assessment is important for breast cancer prevention and early detection. We aimed to examine whether common risk factors, mammographic features and breast cancer risk prediction scores of a woman were associated with breast cancer risk for her sisters.
Methods : We included 53,051 women from the KARMA study. Established risk factors were derived using self-reported questionnaires, mammograms, and SNP genotyping. Using the Swedish Multi-Generation Register, we identified 32,198 sisters of the KARMA women (including 5,352 KARMA participants and 26,846 non-participants). Cox models were used to estimate the hazard ratios of breast cancer for both women and their sisters, respectively.
Results : A higher breast cancer polygenic risk score, a history of benign breast disease, and higher breast density in women were associated with an increased risk of breast cancer for both women and their sisters. No statistically significant association was observed between breast microcalcifications and masses in women and breast cancer risk for their sisters. Furthermore, higher breast cancer risk scores in women were associated with an increased risk of breast cancer for their sisters. Specifically, the hazard ratios for breast cancer per 1 standard deviation increase in age-adjusted KARMA, BOADICEA, and Tyrer-Cuzick risk scores were 1.16 (95% CI = 1.07 to 1.27), 1.23 (95% CI = 1.12 to 1.35) and 1.21 (95% CI = 1.11 to 1.32), respectively.
Conclusion : A woman’s breast cancer risk factors are associated with her sister's breast cancer risk. However, the clinical utility of these findings requires further investigation.
Journal of the National Cancer Institute , article en libre accès, 2022