TyGi reflects levels of endothelial dysfunction, oxidative stress, and inflammatory response.36-38 This is further confirmed by the studies that showed positive associations of the TyGi with WBC and high-sensitivity C-reactive protein levels.10,39 An already impaired immune function of the patients with pre-existing IR is further weakened by the abdominal surgery, making these patients more susceptible to infection. This evidence concerns the gene CRP and endothelial dysfunction.