| Area |
---|
Province | Guarayos | Sara |
---|
 | Concordant results | Kappa values+ | Concordant results | Kappa values |
---|
 | Positives | Negatives |  | Positives | Negatives |  |
---|
TvPCR vs Thin smears
| 9 | 232 | 0.622 | 0 | 233 | -0.007 |
TvPCR vs MHCT
| 5 | 233 | 0.389 | 0 | 235 | -0.007 |
TePCR vs MHCT* | 2 | 238 | 0.245 | 0 | 230 | -0.020 |
- * There is no agreement analysis between TePCR and thin smears because T. evansi was not diagnosed in the smears observations. + Arbitrary bench marks for evaluating kappa values are : >0.81: almost perfect agreement; 0.61 – 0.80: substantial agreement; 0.41 – 0.60: moderate agreement; 0.21 – 0.40: fair agreement; 0 – 0.20: slight agreement; 0: poor agreement and negative results: no agreement. Kappa rages from 1 (complete agreement) to 0 (agreement is equal to that expected by chance) [24]. PCR shows a statistical agreement with parasitological techniques only in Guarayos. There was no agreement between PCR and the parasitological methods in Sara.