Fig. 3.

Comparison of demographic, clinical and biological characteristics in patients with SLE. A: according to phytohemagglutinin (PHA) mitogen-induced whole blood interferon gamma release assay (IGRA)-PHA status. B: according to the IGRA-Spike status. C: according to the IgG anti-Spike antibody status. The positive thresholds of the tests are indicated. For statistical analysis a T-test was used and results are expressed as –log10 of the p value, and significant p values < 0.05 are indicated (dot line).