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Table 2 Intra-operative and postoperative characteristics of patients who underwent cholecystectomy due to cholecystits grouped by NLR

From: The utility of the preoperative neutrophil-to-lymphocyte ratio in predicting severe cholecystitis: a retrospective cohort study

  Total NLR <3 NLR ≥3 p-value
  (n = 632) (n =376) (n =256)  
Operative procedure     0.833
 Open cholecystectomy 6 (0.9) 1 (0.3) 5 (2.0)  
 Laparoscopic cholecystectomy    
  - 4 port procedure 204 (32.3) 120 (31.9) 84 (32.8)
  - 3 port procedure 66 (10.4) 43 (11.4) 23 (9.0)
  - 2 port procedure 307 (48.6) 174 (46.3) 133 (52.0)
  - single port procedure 49 (7.8) 38 (10.1) 11 (4.3)
Mean operative time (min)     < 0.001
 Mean ± SD 76.5 ± 32.7 70.3 ± 25.4 85.6 ± 39.5  
 Median (range) 70.0 (30 – 370) 65.0 (30 – 175) 77.5 (30 – 370)
Insertion of a drain     0.002
 No 373 (59.0) 241 (64.1) 132 (51.6)  
 Yes 259 (41.0) 135 (35.9) 124 (48.4)  
Open conversion 4 (0.6) 2 (0.5) 2 (0.8) 0.485
Addition of one or more port(s) 5 (0.8) 4 (1.1) 1 (0.4)  
Frequency of total analgesics     0.385
 Mean ± SD 3.3 ± 3.9 3.2 ± 3.7 3.5 ± 4.3  
 Median (range) 2.0 (0 – 22) 2.0 (0 – 20) 2.0 (0 – 22)
Postoperative hospital stay (days)     < 0.001
 Mean ± SD 4.4 ± 2.8 3.8 ± 2.1 5.2 ± 3.4  
 Median (range) 4.0 (1 – 24) 3.0 (1 – 23) 5.0 (1 – 24)
Postoperative complications 37 (5.9) 16 (4.3) 21 (8.2) 0.056
 Voiding difficulty 8 4 4  
 Pleural effusion 8 4 4
 Wound infection 5 2 3
 Pneumonia 5 2 3
 Bleeding 4 2 2
 Bile leakage 3 1 2
 Pneumothorax 1 1 0
 Pancreatitis 1 0 1
 Delayed gastric emptying 2 0 2  
  1. Abbreviations: NLR neutrophil-to-lymphocyte ratio, SD standard deviation.