Reader #a True positives True negatives False positives False negatives
M M+A M M+A M M+A M M+A
1 28 45 32 21 27 30 15 6
2 28 45 25 21 33 30 16 6
3 25 44 30 20 32 31 15 7
4 26 43 20 28 43 23 13 8
5 26 43 32 30 28 21 16 8
6 32 43 20 37 43 14 7 8
7 26 41 25 27 33 24 18 10
8 23 40 35 31 17 20 27 11
9 16 40 43 25 21 26 22 11
10 27 39 34 36 27 15 14 12
11 26 37 35 41 24 10 17 14
12 22 37 37 34 20 17 23 14
Mean # of cases 25.4 41.4 30.7 29.3 29.0 21.8 16.9 9.6
% of 51 cases 49.8% 81.2% 60.2% 57.5% 56.9% 42.7% 33.1% 18.8%
Mean # of added cases 16.0 −1.4 −7.2 −7.3
Mean % of 51 cases added 31.4% −2.7% −14.1% −14.3%
% improvement compared with M alone 63% −4% −25% −43%