BCR and breast cancer: When analyses were stratified for primary breast cancer mode of detection, the association between Apo B and BCR was attenuated for patients detected through mammography screening (T3, adjHR: 1.01 [95% CI 0.31–3.28]), while the association was persistent for patients with a clinically detected breast cancer (T3, adjHR: 3.87 [95% CI 1.39–10.75]) (Table 5).