Subgroup analysis to check the added prognostic value of LNR over pN within specific subgroups.

aModel adjusted for age at diagnosis, chemotherapy, radiotherapy, surgery type, grade and tumor size and stratified by ER status.bModel adjusted for age at diagnosis, chemotherapy, surgery type and tumor size.cModel adjusted for age at diagnosis, chemotherapy, radiotherapy, surgery type and tumor size and stratified by ER status. All models were internally validated using bootstrap resampling.