Abstract
We devised a general method for interpretation of multistage diseases using continuous-data diagnostic tests. As an example, we used paratuberculosis as a multistage infection with 2 stages of infection as well as a noninfected state. Using data from a Danish research project, a fecal culture testing scheme was linked to an indirect ELISA and adjusted for covariates (parity, age at first calving, and days in milk). We used the log-transformed optical densities in a Bayesian network to obtain the probabilities for each of the 3 infection stages for a given optical density (adjusted for covariates). The strength of this approach was that the uncertainty associated with a test was imposed directly on the individual test result rather than aggregated into the population-based measures of test properties (i.e., sensitivity and specificity)
| Original language | English |
|---|---|
| Journal | Journal of Dairy Science |
| Volume | 88 |
| Issue number | 11 |
| Pages (from-to) | 3923-3931 |
| Number of pages | 9 |
| ISSN | 0022-0302 |
| DOIs | |
| Publication status | Published - 2005 |