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Table 3 Coordinates of the ROC curves in Fig. 5

From: Comparison of bulk milk antibody and youngstock serology screens for determining herd status for Bovine Viral Diarrhoea Virus

Test result variables Positive if greater than or equal to a or b# Sensitivity 1 - Specificity
aNumber of youngstock antibody positive out of ten tested without delay −1.00 1.000 1.000
.50 .909 .500
1.50 .909 .167
2.50 .909 0.000
3.50 .818 0.000
5.00 .727 0.000
6.50 .636 0.000
7.50 .545 0.000
9.00 .273 0.000
11.00 0.000 0.000
bBulk milk antibody OD ratio without delay −.8500 1.000 1.000
.2400 1.000 .857
.3750 1.000 .714
.4300 1.000 .571
.4550 1.000 .429
.4950 1.000 .286
.5300 .900 .286
.6050 .800 .286
.7000 .800 .143
.7650 .700 .143
.8250 .600 .143
.8550 .500 .143
.8750 .400 .143
.8950 .300 .143
.9100 .200 .143
.9250 .200 0.000
.9800 .100 0.000
2.0300 0.000 0.000
  1. # The smallest cutoff value is the minimum observed test value minus 1, and the largest cutoff value is the maximum observed test value plus 1. All the other cutoff values are the averages of two consecutive ordered observed test values