At the time of CDI diagnosis, there were no significant differences in laboratory parameters between ICHs and immunocompetent patients with regard to creatinine (1.46 ± 1.54 vs 1.48 ± 1.65, P = .2), albumin (median 2.93 vs 2.90, P = .4), or C reactive protein (CRP) (median 8.8 vs 9, P = .8). Here, CRP is linked to clostridium difficile infection.