Validation of the 8th AJCC prognostic staging system for breast cancer in a population-based setting

To validate the newly proposed American Joint Committee on Cancer (AJCC) prognostic staging system for breast cancer. Surveillance, epidemiology, and end results (SEER) database (2010–2014) was accessed. Cumulative incidence function was conducted (through assessment of sub-distribution hazard) according to both anatomical and prognostic stages. Likewise, Cox cause-specific hazard ratio with pairwise hazard ratio comparisons were also assessed...