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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
Table 2 Nutritional status indicators at different time points, mean ± SD
Indicator
Time point
Observation group (n = 60)
Control group (n = 60)
t-value
P value
Serum albumin (g/L)Baseline (day 0)32.1 ± 3.231.8 ± 3.50.350.731
Postoperative day 736.5 ± 2.834.2 ± 3.13.040.005
Postoperative day 1439.8 ± 2.536.1 ± 3.25.01< 0.001
Prealbumin (mg/L)Baseline (day 0)180 ± 25178 ± 280.300.767
Postoperative day 7215 ± 22195 ± 263.240.003
Postoperative day 14245 ± 20210 ± 285.67< 0.001
Transferrin (mg/L)Baseline (day 0)2.0 ± 0.31.9 ± 0.40.980.332
Postoperative day 72.4 ± 0.32.1 ± 0.43.280.004
Postoperative day 142.7 ± 0.22.3 ± 0.44.89< 0.001
Table 3 Gastrointestinal function recovery indicators, mean ± SD
Indicator
Observation group (n = 60)
Control group (n = 60)
Test statistic
P value
Time to first flatus (hours)48.3 ± 8.268.5 ± 12.3t = 7.56< 0.001
Time to first defecation (hours)72.1 ± 10.596.8 ± 15.2t = 7.32< 0.001
GI symptom score (0-10)13.2 ± 1.15.8 ± 1.4t = 8.12< 0.001
Time to oral intake (days)4.2 ± 1.06.0 ± 1.5t = 5.53< 0.001
Time to full oral diet (days)6.8 ± 1.29.5 ± 1.8t = 6.80< 0.001
Bowel sound recovery (hours)36.5 ± 6.854.2 ± 9.1t = 8.51< 0.001
Table 4 Postoperative complications, n (%)
Complication type
Observation group (n = 60)
Control group (n = 60)
χ2/Fisher’s1
P value
PTCD-related
Bile leakage2 (6.7)6 (20.0)χ2 = 4.040.045
Catheter dislodgement1 (3.3)3 (10.0)Fisher’s0.301
Infectious
Drainage site infection2 (6.7)5 (16.7)Fisher’s0.214
Systemic infection/sepsis1 (3.3)4 (13.3)Fisher’s0.152
Total infections3 (10.0)9 (30.0)χ2 = 4.320.037
Nutrition tube-related
Tube blockage1 (3.3)5 (16.7)Fisher’s0.035
Tube displacement0 (0.0)2 (6.7)Fisher’s0.150
Aspiration pneumonia0 (0.0)1 (3.3)Fisher’s0.313
Other complications
Wound infection1 (3.3)4 (13.3)Fisher’s0.152
GI bleeding0 (0.0)2 (6.7)Fisher’s0.150
Electrolyte imbalance2 (6.7)6 (20.0)χ2 = 4.040.045
Recurrent jaundice1 (3.3)4 (13.3)Fisher’s0.152
Overall
Total patients with ≥ 1 event6 (20.0)15 (50.0)χ2 = 5.930.015


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