Comparison of surgical factors between the groups

VariablesGroup I (N = 24)Group II (N = 79)P-value*
Duration of surgery (hours)4.55 ± 1.624.30 ± 1.580.566
    ≥ 5 h11 (45.8%)27 (34.18%)0.231
Operative blood loss (mL)302.08 ± 419.23193.75 ± 79.830.220
    ≥ 350 mL:< 350 mL7:17 (29.16%:70.83%)1:78 (1.27%:98.73%)0.004
Urine volume during surgery (mL)718.75 ± 355.95477.08 ± 279.740.012
    ≥ 600 mL:< 600 mL15:9 (62.50%:37.50%)23:56 (29.11%:70.89%)0.002
Infusion amount2478.33 ± 1045.122110.42 ± 675.340.265
APACHE II score (first 24 h in ICU)9.54 ± 4.026.75 ± 2.310.005
    ≥ 9:< 915:9 (62.50%:37.50%)13:66 (16.46%:83.54%)0.001
Mortality predicted using the APACHE II score (%)10.02 ± 2.864.47 ± 2.350.002

* Compared with the analysis of variance for interval data or chi-square test for categorical data