TABLE 7.
Discrepant sample data summary
| Antibody | IFA
|
IP or HA
|
EIA
|
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of tests done | No. of false negatives (%) | No. of false positives (%) | No. of tests done | No. of false negatives | No. of false positives | No. of inconclusive resultsb | No. of tests done | No. of false negatives (%) | No. of false positives (%) | No. of inconclusive results (%)a | |
| dsDNA | 158 | 10 (6.9) | 4 (2.6) | 223 | 6 (2.7) | 3 (2.6) | 0 (0) | ||||
| Centromere | 163 | 0 | 0 | 43 | 0 | 0 | 0 | ||||
| SS-A | 101 | 11 | 0 | 0 | 292 | 7 | 2 | 6 | |||
| SS-B | 103 | 1 | 4 | 0 | 284 | 0 | 3 | 0 | |||
| Sm | 112 | 0 | 1 | 1 | 271 | 0 | 2 | 23 | |||
| U1-RNP | 113 | 3 | 0 | 7 | 270 | 0 | 1 | 42 | |||
| Scl-70 | 101 | 1 | 5 | 2 | 231 | 0 | 1 | 12 | |||
| Jo-1 | 85 | 3 | 1 | 0 | 190 | 0 | 5 | 0 | |||
| Total (%) | 615 | 19 (3.1) | 11 (1.8) | 10 (1.6) | 1,538 | 7 (0.5) | 14 (0.9) | 83 (5.4) | |||
a
EIA negative results in which a significant minority of results were positive. These results may be false negatives.
b
Ouchterlony assay negative results in which a significant majority of EIA results were positive. These results may be false negatives.