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For dependent variables, HOMA-IR at 5 days and ΔHOMA-IR (5-day value —preop. value) were used. Independent variables included all variables shown in Tables 1 and 2 and Figure 1 at 24 h, or the change in these variables at 24 h (24-h value—preop. value). Forward stepwise regression analysis was used, with the model explaining the greatest variability presented.