Table 5.
Indeterminate Results: If results from the UMMC ELISA test and Ortho Vitros tests were discordant a result of indeterminate was given. Individuals with indeterminate results were asked to return for follow-up testing 14–21 days later.
| Indeterminate at First Test | Repeat Testing |
||
|---|---|---|---|
| Initial Results | Repeat Results | ||
| Number of Indeterminate Samples | 107/8399 (1.27%) | 107/8399 (1.27%) | 91/8399 (1.08%) |
| Number of Samples Re-Tested | N/A | 36/107 (33.6%) | 36/107 (33.6%) |
| Ortho Vitros Test Positive & UMMC ELISA negative | 82/107 (76.6%) | 27/36 (75%) | 18/36 (50%)a |
| Ortho Vitros Test negative & UMMC ELISA Positive | 25/107 (23.4%) | 9/36 (25%) | 2/36 (5.5%)a |
| Ortho Vitros Test Negative & UMMC ELISA Negative | N/A | 10/36 (27.8%)b | |
| Ortho Vitros Test Positive & UMMC ELISA Positive | 6/36 (16.7%)c | ||
a
There was no change in results from initial and repeat testing
b
3 individuals were initially positive by the Ortho Vitros Test and 7 were initially positive by the UMMC ELISA.
c
All were initially negative by UMMC ELISA and positive by Ortho Vitros test