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Table 7 Sensitivity (Se) and specificity (Sp) of detecting the farms with new infections with the subset of truly negative and known positive farms for different score counts and thresholds of 50 % and 95 %

From: Evaluation of farm-level parameters derived from animal movements for use in risk-based surveillance programmes of cattle in Switzerland

 

Threshold

  

50 %

95 %

Score count

≥1

≥2

≥3

≥4

≥5

≥1

≥2

≥3

≥4

≥5

FP

.

962

604

312

111

778

114

4

1

0

TP

.

29

26

20

11

23

11

3

1

0

FN

.

0

3

9

18

6

18

26

28

29

TN

.

554

912

1204

1405

738

1402

1512

1515

1516

Se

.

100.00 %

89.66 %

68.97 %

37.93 %

79.31 %

37.93 %

10.34 %

3.45 %

0.00 %

Sp

.

36.54 %

60.16 %

79.42 %

92.68 %

48.68 %

92.48 %

99.74 %

99.93 %

100.00 %

  1. FP false positive, TP true positive, FN false negative, TN true negative