Comparison between IF on Wil2 and anti ds- or -ss DNA antibodies. Eighty serum samples were classified according to the fluorescence pattern on Wil 2 cells: “2” pattern or other pattern (“1” or “0”). The medians of titres in anti ds- or ss- DNA antibodies obtained in two independent ELISA were indicated in relation with each fluorescent pattern
| Antibody specificity | Titres of antibody according to immunofluorescence patterns | ||
|---|---|---|---|
| 0 or 1 | 2 | ||
| -dsDNA | median | 274-150 | 65† |
| range | 1–61 | 0–5281 | |
| mean (SD) | 28 (18) | 224 (734) | |
| -ss DNA | median | 56 | 145‡ |
| range | 2–201 | 0–400 | |
| mean (SD) | 64 (50) | 193 (151) | |
↵4-150 Arbitrary units. “0” or “1” versus “2” (Mann-Whitney): †p=0.0004 ‡p=0.0013.