CRP and systemic lupus erythematosus: Serum concentration of fibrinogen was higher in SLE (SLE 326±147 mg/dl vs RA 276±101 mg/dl; p = 0.01), but CRP levels were similar in both groups (SLE 1.16±3.2 mg/dl vs 1.06±2.5 mg/dl; p = 0.75).