Body mass index (BMI) is not as important to cancer outcomes as previously thought, according to the ABCPP (After Breast Cancer Pooling Project), which analyzed the effects of BMI, comorbidities and physical activity on mortality. Previous studies showed that being overweight increases breast cancer recurrence, breast cancer–specific mortality and overall mortality.
The investigators used data from three patient cohorts (the Women’s Healthy Eating and Living Study, the Life After