TABLE 2.
Interassay concordance in the analysis of blood donor samples (n = 1455) from Chaco Province, Argentina (2006–2007)*
| EIA BioM | EIA BiosCh | EIA BioZ | EIA Wrec | PA | TIA | IHA | IHA LC | |
|---|---|---|---|---|---|---|---|---|
| EIA BioM | ||||||||
| EIA BiosCh | 98.1 | |||||||
| EIA BioZ | 98.4 | 97.7 | ||||||
| EIA Wrec | 97.0 | 97.3 | 96.6 | |||||
| PA | 95.2 | 96.3 | 95.8 | 95.1 | ||||
| TIA | 95.1 | 94.4 | 95.1 | 94.4 | 93.1 | |||
| IHA | 92.1 | 93.6 | 92.7 | 92.6 | 94.6 | 90.4 | ||
| IHA LC | 88.0 | 89.6 | 89.0 | 88.3 | 91.6 | 87.1 | 93.3 |
*
For each pair of assays compared, concordance was defined as (Number positive by both assays + Number negative by both assays)/ Number tested (= 1455).
EIA BioM = Chagatek; EIA BiosCh = Chagas BiosChile; EIA BioZ = BioZima Chagas; EIA Wrec = Chagatest rec. 3.0; PA = Chagas Serodia; TIA = trans-sialidase inhibition assay; IHA = Chagas HAI; IHA LC = HAI LC.