Fig. 1
Correct positive, correct negative, false positive, and false-negative results by progesterone ELISA and barium chloride tests for detection of pregnancy and corpus luteum in cows
| Progesterone ELISA (number (%)) | Barium chloride test (number (%)) | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Correct positive | Correct negative | False- positive | False- negative | Correct positive | Correct negative | False- positive | False-negative | ||
| Pregnancy | 34 (45.9) | 25 (33.8) | 15 (20.3) | 0 | 27 (36.5) | 12 (16.2) | 28 (37.8) | 7 (9.5) | 74 (100.0) |
| CL | 49 (66.2) | 15 (20.3) | 0 | 10 (13.5) | 47 (63.5) | 13 (17.6) | 7 (9.5) | 7 (9.5) | 74 (100.0) |
Values of sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of progesterone ELISA-and barium chloride tests for detection of pregnancy and corpus luteum
| Method of detection | Sensitivity | Specificity | PPV | NPV | Accuracy | |
|---|---|---|---|---|---|---|
| Progesterone ELISA | Pregnancy | 100.0 | 62.5 | 69.4 | 100.0 | 79.7 |
| CL | 83.0 | 100.0 | 100.0 | 60.0 | 86.4 | |
| Barium chloride test | Pregnancy | 79.4 | 30.0 | 49.0 | 63.0 | 52.7 |
| CL | 87.0 | 65.0 | 87.0 | 65.0 | 81.0 |