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ROC curves of presurgical neutrophil-to-lymphocyte ratio (NLR) (A) and platelet-to-lymp-hocyte ratio (PLR) (B) for predicting surgical site infection (SSI) in subgroups. ASA = American Society of Anesthesiologists. BMI = body mass index. ∗∗P < .05, ∗P < .000.
