Publications by authors named "R MacInnis"
Background: The 313-variant polygenic risk score (PRS) provides a promising tool for clinical breast cancer risk prediction. However, evaluation of the PRS across different European populations which could influence risk estimation has not been performed.
Methods: We explored the distribution of PRS across European populations using genotype data from 94,072 females without breast cancer diagnosis, of European-ancestry from 21 countries participating in the Breast Cancer Association Consortium (BCAC) and 223,316 females without breast cancer diagnosis from the UK Biobank.
Menopausal users of hormone replacement therapy (HRT) are at increased breast cancer risk and decreased colorectal cancer (CRC) risk compared with individuals who have never used HRT, but these opposing associations may differ by familial risk of breast cancer and CRC. We harmonized data from 3 cohorts and generated separate breast cancer and CRC familial risk scores based on cancer family history. We defined moderate or strong family history as a risk score of 0.
View Article and Find Full Text PDFGenetic variation at the 19q13.3 KLK locus is linked with prostate cancer susceptibility in men. The non-synonymous KLK3 single nucleotide polymorphism (SNP), rs17632542 (c.
View Article and Find Full Text PDFPhysical Activity during Adolescence and Early Adulthood and Breast Cancer Risk before Age 40 Years.
Cancer Epidemiol Biomarkers Prev
January 2025
Article Synopsis
- The study investigates the relationship between recreational physical activity (RPA) in adolescence and early adulthood and breast cancer (BC) risk in women under 40 years old, using data from a large international family cohort.
- Results indicate that higher levels of RPA are linked to reduced BC risk, with a 12% lower risk during adolescence and a 16% lower risk during early adulthood for women in the highest activity quartiles.
- The findings suggest that encouraging more physical activity in young women could be a crucial strategy for lowering the increasing incidence of breast cancer in this age group.
Importance: Few studies have investigated whether the associations between pregnancy-related factors and breast cancer (BC) risk differ by underlying BC susceptibility. Evidence regarding variation in BC risk is critical to understanding BC causes and for developing effective risk-based screening guidelines.
Objective: To examine the association between pregnancy-related factors and BC risk, including modification by a of BC where scores are based on age and BC family history.