Figure 2.

Serum FSTL1 levels in HC (n = 69), early RA patients (n = 48), long-standing RA patients (n = 159), RF-negative RA patients (n = 59), RF-positive RA patients (n = 148), ACPA-negative patients (n = 54) and ACPA-positive patients (n = 152). Horizontal lines represent median values. Each point represents an individual value (*P < 0.05; ****P < 0.0001). FSTL1, follistatin-like protein 1; HC, healthy individuals; RA, rheumatoid arthritis; RF, rheumatoid factor; ACPA, anti-cyclic citrullinated peptide antibody.

Li et al. Arthritis Research & Therapy 2011 13:R17   doi:10.1186/ar3241
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