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Table 4 Early and late complication in each surgery group

From: Two-year outcomes of sleeve gastrectomy versus gastric bypass: first report based on Tehran obesity treatment study (TOTS)

  SG (n = 2202) GB (n = 1085) P-value
Operation time, minutes 56.5 ± 16.2 72.7 ± 24.3 < 0.001
Anesthesia time, minutes 105.2 ± 22.9 121.8 ± 30.4 < 0.001
Hospital stay (range: 1–29), day 2.5 ± 2.8 2.5 ± 2.7 0.781
Early (30-day) 103 (4.6%) 128 (11.7%) < 0.001
Death 0 1
Re-operation 19 (0.8%) 39 (3.5%) < 0.001
 Bleeding 10 21
 Intestinal obstruction 1 5
 Abscess/infection 5 4
 Staple line leak 3 8
 Marginal ulcer perforation 0 1
Re-admission 25 (1.1%) 22 (2%) 0.043
 Infection/Fever 6 8
 Deep vein thrombosis 8 4
 Vomiting or poor intake 10 7
 Marginal ulcer 0 2
 GERD 1 1
Hospital stay ≥ 7 day 59 (2.6%) 66 (6%) < 0.001
 Infection/ Fever 8 4
 Fluid or electrolyte depletion 4 1
 Bleeding requiring transfusion 28 43
 Pulmonary embolism 3 9
 Pneumonia 7 4
 Other 9 5
Late (> 30 days up to one year) 49 (2.2%) 57 (5.2%) < 0.001
Death 2 4 0.097
 Liver failurea 0 1
 Myocardial infarction 0 1
 Cancer 2 1
 Other 0 1
Re-operation 36 (1.6%) 28 (2.5%) 0.066
 Anastomosis stricture 0 2
 Marginal ulcer perforation 0 1
 Internal Hernia 1 2
 Intestinal obstruction 0 1
 Cholecystectomy 32 10
 PCM needed revision surgery 0 7
 Other 3 5
Re-admission 11 (0.5%) 25 (2.3%) < 0.001
 GERD 9 11
 Wound Infection 2 2
 PCM needed TPN 0 12
  1. SG sleeve gastrectomy, GB gastric bypass, GERD Gasteroesophagial reflux disease, PCM protein calorie malnutrition, TPN Total Parenteral nutrition
  2. aliver failure due to protein calorie malnutrition