GAPDH and systemic lupus erythematosus: When SLE patients were divided into the NPSLE group and non-NPSLE group, we observed that the anti-GAPDH autoantibody levels in the NPSLE group (AU: 83.07 (43.66 to 115.8)) were more elevated than those in the non-NPSLE group (AU: 68.46 (46.48 to 93.81)) with marginal difference (P = 0.0588) (Figure 1(b)).