Table 1: Comparison of demographic variables in patients <71 years and ≥71 years.

Demographic variable<71 y≥71 y value

2065382
Age (y)5376
Presentation( )( )
 Palpable mass766 (37%)137 (36%)<0.001
 Mammographic calcium471 (23%)62 (16%)
 Mammographic mass434 (21%)138 (36%)
 Mammographic abnormality27 (1%)1 (0.26%)
 Other367 (18%)44 (12%)
Mammography: positive/suspicious1757/1869 (94%)326/348 (94%)0.813
Diagnostic method( )( )
 Excisional biopsy768 (40%)157 (43%)0.256
 Fine-needle aspiration445 (23%)87 (24%)
 Core needle biopsy720 (37%)119 (33%)

Data are presented as , median, or (%).