Table 1

Summary of patient characteristics

CharacteristicStudy group
P
NonrecurrentRecurrent
No. of patients9039
Age (y), median (range)56 (42-82)55 (39-65)0.198
Median recurrence time (mo), median (range)21 (10-60)
Tumor grade (%)
    Low12 (13.3)0 (0.0)0.001
    Intermediate34 (37.8)6 (15.4)
    High44 (48.9)33 (84.6)
Tumor size (mm), median (range)20 (4 to extensive)16 (4 to extensive)0.208
ER status (%)
    Positive60 (69.0)23 (60.5)0.358
    Negative27 (31.0)15 (39.5)
Ki67 (%), median (range)10.9 (0.5-38.3)15.5 (2.0-61.1)0.005
Excision margin status (%)
    Involved (<1 mm)13 (14.5)16 (41.0)0.03
    Clear (≥1 mm)65 (72.2)22 (56.4)
    Unknown12 (13.3)1 (2.6)
Adjuvant radiotherapy6 (7)2 (5)0.9