In a study of 41 patients with community-acquired pneumonia admitted in the ICU, the 29% who had had an elevated CPK (more than 1000 U/l) had higher mortality when compared to the 71% without elevated CPK, though the initial severity and renal impairment was the same for the two groups. This suggests that the presence of rhabdomyolysis is a bad prognostic factor irrespective of the presence or absence of renal impairment [10] .