Pre-operative, first hour postoperative, POD 1 and POD 5 microalbuminuria levels were 16.5 ± 17.2, 28.5 ± 17.2, 59.0 ± 29.8 and 23.0 ± 20.0 mg/l in group T, and 30.0 ± 17.7, 51.0 ± 28.4, 75.0 ± 25.6 and 52.5 ± 27.5 mg/l in Group N-T, respectively, and there were statistically significant differences between four microalbuminiria levels in each group (p < 0.001) (Table 3). Pre-operative, first hour postoperative and POD 5 values were statistically significantly different between the groups (p = 0.018, p = 0.008 and p = 0.001, respectively) (Table 3). However, the difference in POD 1 values between the groups was at the threshold of significance (p = 0.071).