Estimated sensitivity and specificity , respectively , were 100 % ( 95 % CI : 91 % to 100 % ) and 94.6 % ( 95 % CI : 86.7 % to 98.5 % ) for FFDM and 91.1 % ( 95 % CI : 78.8 % to 97.5 % ) and 100 % ( 95 % CI : 94.8 % to 100 % ) for DBT .