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ANA inter-test percentage agreement among IFA1 (n=805), IFA2 (n=805), and ELISA (n=805)
| Enrolment (%) | Year 3 (%) | Year 5 (%) | ||||
|---|---|---|---|---|---|---|
| IFA1 | IFA2 | IFA1 | IFA2 | IFA1 | IFA2 | |
| IFA2 | 96.4% (94.9 –97.6) | 95.2% (93.4–96.5) | 95.5% (93.9–96.8) | |||
| ELISA | 94.8% (93.0–96.2) | 95.7% (94.0–97.0) | 91.2% (89.0–93.0) | 92.5% (90.5–94.3) | 91.4% (89.3–93.3) | 91.2% (89.0–93.0) |
Abbreviations: ANA, anti-nuclear antibodies; ELISA, enzyme-linked immunosorbent assay; IFA; indirect immunofluorescence assay.
