Table 2: Correlation between serum GITRL levels laboratory values.

Parameter Correlation coefficient value Anti-ds-DNA 0.467 0.021 ESR 0.284 0.048 CRP −0.164 0.271 C3 −0.423 0.001 C4 −0.256 0.059 IgG 0.161 0.24 IgA −0.099 0.484 IgM 0.548 0.0001 ANA 0.224 0.093 24-hour urine protein 0.057 0.713

SLEDAI: SLE disease activity index; anti-ds-DNA: anti-double stranded DNA antibody; C3: complement 3; C4: complement 4; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; IgG: immunoglobin G; IgA: immunoglobin A; IgM: immunoglobin M; ANA: antinuclear antibody.