Agreement within subgroups of biopsy-stage tumor characteristics.

1Sentinel node biopsy; 2Adjuvant! online; 3Significant at McNemar test; 4All patients were indicated for systemic therapy at the biopsy-stage. Agreement in subgroups of tumor characteristics: age, estrogen receptor-status, tumor grade, tumor size, lymph node status on fine-needle aspiration or biopsy and preoperative sentinel node biopsy status.