Table 1.
IgG, IgM, and IgA antiphospholipid antibody titers of selected SLE/APS samples determined on two enzyme-linked immunoassay (ELISA) tests
| Sample | IgA anti-β2 GPI* | IgG anti-β2 GPI* | IgM anti-β2 GPI* | ||
|---|---|---|---|---|---|
|
|
|
|
|||
| SLE/APS | Assay A | Assay B | Assay A | Assay B | Assay A |
| 1 | 252 | 19 | 159 | 78 | 50 |
| 2 | 168 | 9.9 | 163 | 192 | 4.7 |
| 3 | 144 | 10 | 237 | 204 | 6.4 |
| 4 | 388 | 53 | 143 | 41 | 16 |
| Negative | 2.9 | 3.1 | 1.8 | 1.5 | 2.5 |
*
Results expressed in IgG (GPL), IgM (MPL), and IgA (APL) antiphospholipid units.
Normal cut-off value of <20
SLE: systemic lupus erythematosus; APS: antiphospholipid syndrome