Research Article
Prevalence and Risk Factors of Bovine and Ovine Lungworm Infection at Durame District, Southern Ethiopia
Table 1
Method of calculating sensitivity, specificity, PPV, and NPV.
| Techniques | Gold standard (necropsy) | Modified Baermann | Positive | Negative | Total | Positive | a | b | a/a+b (PPV) | Negative | c | d | d/c+d (NPV) | Total | a+c | b+d | | | a/a+c (sensitivity) | d/b+d (specificity) | |
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