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Retrospective Cohort Study
Copyright: ©Author(s) 2026.
World J Gastrointest Surg. May 27, 2026; 18(5): 116545
Published online May 27, 2026. doi: 10.4240/wjgs.v18.i5.116545
Table 1 Baseline characteristics of study patients, mean ± SD/n (%)
Characteristic
Observation group (n = 60)
Control group (n = 60)
Test statistic
P value
Demographics
Age (years)58.2 ± 6.558.9 ± 7.0t = 0.400.693
Gender (male/female)34/2632/28χ2 = 0.070.795
BMI (kg/m2)23.5 ± 3.023.2 ± 2.8t = 0.420.678
Baseline nutritional status
Serum albumin (g/L)32.1 ± 3.231.8 ± 3.5t = 0.350.731
Prealbumin (mg/L)180 ± 25178 ± 28t = 0.300.767
Transferrin (mg/L)2.0 ± 0.31.9 ± 0.4t = 0.980.332
Liver function tests
Total bilirubin (μmol/L)280 ± 50275 ± 45t = 0.420.674
Direct bilirubin (μmol/L)180 ± 30175 ± 35t = 0.620.539
ALT (U/L)120 ± 20118 ± 22t = 0.380.703
AST (U/L)110 ± 18108 ± 20t = 0.420.677
Disease etiology
Benign biliary disease30 (50.0)28 (46.7)χ2 = 0.070.796
Malignant biliary disease30 (50.0)32 (53.3)χ2 = 0.070.796
Comorbidities
Hypertension20 (33.3)22 (36.7)χ2 = 0.070.786
Diabetes mellitus16 (26.7)14 (23.3)χ2 = 0.090.766
Chronic kidney disease6 (10.0)4 (6.7)Fisher’s1.000


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