Fig. 2.

The correlations between CD4 T cell subsets and clinical characters in SLE. SLEDAI, SLE Disease Activity Index. ESR, erythrocyte sedimentation rate. C3, complement 3. C4, complement 4. IFN-α, interferon-α. IL-2, Interleukin-2. IL-21, interleukin-21. IL-7, interleukin-7. IFN-γ, interferon-γ. IL-17, interleukin-17. IL-10, interleukin-10. TGF-β, tumor necrosis factor-β. The scale color of the filled squares indicates the strength of the correlation (r) and whether it is negative (blue) or positive (red). **, P<0.01. *, P<0.05. ▲, P<0.1. #, absolute number, cells/μl. %, proportion of cells in lymphocyte