Table 6
Comparisons of baseline variables and preoperative laboratory findings in the patients according to the time of diagnosis with metabolic acidosis

Variable	At POD 1 (n=66)	1<POD≤14 (n=44)	POD>14 (n=42)	P-value
Age (yr)	63.8±10.2	64.8±11.9	64.7±8.9	0.843
Male sex	47 (71.2)*	38 (86.3)	39 (92.9)	0.011
Diabetes mellitus	9 (13.6)	12 (27.3)	5 (11.9)	0.103
Hypertension	25 (37.9)†	27 (61.4)	17 (40.48)	0.040
Laboratory findings
Total CO2 (mEq/L)	25.2±2.0	25.4±2.0	25.6±1.5	0.548
Sodium (mEq/L)	141.3±2.7	141.5±1.9	141.1±2.3	0.758
Potassium (mEq/L)	4.3±0.3‡	4.5±0.3	4.4±0.4	0.042
Chloride (mEq/L)	104.3±2.6	104.1±3.1	104.2±2.8	0.945
Blood urea nitrogen (mg/dL)	17.4±7.0	15.3±5.4	15.6±5.0	0.160
Creatinine (mg/dL)	1.0±0.3	1.1±0.4	1.0±0.3	0.469
Albumin (g/dL)	4.2±0.3	4.2±0.3	4.2±0.4	0.946

Values are presented as mean±standard deviation or number (%). ANOVA and Bonferroni tests were applied for comparisons.
POD, postoperative day.
^*P=0.043 vs. POD>14. ^†P=0.046 vs.1<POD≤14. ^‡P=0.041 vs. 1<POD≤14.