The two groups did not differ significantly in terms of age, sex, BMI, presence of medical illness (including hypertension, cardiac disease, cardiovascular accident, asthma, diabetes mellitus, peptic ulcer, hepatitis, liver cirrhosis, gallstone disease, and thyroid problems), and preoperative laboratory data (hemoglobin levels, white blood cell [WBC] counts, percentages of segmented WBC, serum albumin levels, blood urea nitrogen levels, creatinine levels, aspartate aminotransferase levels, and total bilirubin levels). This evidence concerns the gene ALB and hypertensive disorder.