Characteristics of included patients and their breast cancer tumor (N = 152).

athe average and median were calculated only for the tumors defined as positive, i.e. staining was observed in ≥ 10% of tumor cells by immunohistochemistry. bIf the actual percentage was not provided, patients were deemed positive if ER staining was observed in ≥ 10% of tumor cells by immunohistochemistry and/or target protein (ER or PgR) was >10 fmol/mg total protein as determined by biochemistry. cthe 5 ER- tumors had a PgR status of 90%, 50%, 90%, 80% and IHC+ (i.e. >10%) respectively. Abbreviations: R: patients with recurrence. N: patients without recurrence. Disc.: Discovery set. Test#1: Test set#1. Test#2: Test set#2. Avg: average IDC: invasive ductal carcinoma. ILC: invasive lobular carcinoma. TTR: time to recurrence.