CRP and nephritis: The risk factors of infection in patients with SLE include the overall disease activity, higher C-reactive protein levels, higher anti-dsDNA levels, low complement levels, nephritis, daily dose of prednisone>10 mg, and others (Duffy et al., 1991; Suh et al., 2001; Bosch et al., 2006; Jeong et al., 2009).