CRP and Ascites: In this study, we demonstrated that peritoneal CT attenuation values in patients with UGI perforations correlated with several parameters of systemic inflammation and organ dysfunction at admission, including CRP, serum creatinine, and BUN levels; microbial ascites; hospital mortality; and severity of illness scores; suggesting that peritoneal CT attenuation values could predict the severity of disease associated with UGI perforation.