Table 2 Coordinates of the ROC curves in Fig. 2
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 with delays between the YS screen and whole herd test | −1.00 | 1.000 | 1.000 |
1.00 | .909 | .500 | |
3.00 | .818 | .333 | |
4.50 | .636 | .333 | |
5.50 | .636 | .167 | |
6.50 | .545 | 0.000 | |
7.50 | .455 | 0.000 | |
8.50 | .273 | 0.000 | |
9.50 | .091 | 0.000 | |
11.00 | 0.000 | 0.000 | |
bBulk milk antibody OD ratio with delays between the BM Ab screen and whole herd test | −.5630 | 1.000 | 1.000 |
.4440 | 1.000 | .857 | |
.4575 | 1.000 | .714 | |
.5225 | 1.000 | .571 | |
.6520 | .900 | .571 | |
.7315 | .900 | .429 | |
.7590 | .800 | .429 | |
.7840 | .800 | .286 | |
.7950 | .800 | .143 | |
.8025 | .700 | .143 | |
.8075 | .600 | .143 | |
.8285 | .500 | .143 | |
.8535 | .400 | .143 | |
.8650 | .300 | .143 | |
.8850 | .200 | .143 | |
.9600 | .100 | .143 | |
1.1885 | 0.000 | .143 | |
2.3570 | 0.000 | 0.000 |