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Table 6 Comparison of the two groups’ baseline characteristics after matching

From: Comparison of prolonged postoperative ileus between laparoscopic right and left colectomy under enhanced recovery after surgery: a propensity score matching analysis

Variable LC (n=247) RC (n=247 ) t/χ2 p value
Sex    0.206 0.650
 Male 143 138   
 Female 104 109   
Age (years) 57.5±12.2 59.1±12.9 − 1.353 0.177
Diabetes mellitus    0.037 0.848
 No 166 164   
 Yes 81 83   
Hypertension    0.144 0.704
 No 165 161   
 Yes 82 86   
Smoking habit    0.041 0.840
 Nonsmoker 180 178   
 Smoker 67 69   
Current alcohol use    0.778 0.378
 No 177 168   
 Yes 70 79   
Previous abdominal surgery    0.067 0.796
 No 211 213   
 Yes 36 34   
Chronic obstructive pulmonary disease    0.074 0.786
 No 215 217   
 Yes 32 30   
BMI (kg/m2) 23.1±3.2 22.7±2.8 1.511 0.131
Preoperative anemia    1.448 0.229
 No 184 172   
 Yes 63 75   
Preoperative serum albumin level (g/L) 38.4±4.0 38.2±4.3 0.680 0.497
ASA    0.495 0.482
 I–II 182 175   
 III–IV 65 72   
Tumor size    0.203 0.653
 <5 cm 123 118   
 ≥5 cm 124 129   
Operation time (min)    0.980 0.322
 <180 115 126   
 ≥180 132 121   
Blood loss (ml) 171.4±86.0 173.7±79.2 − 0.305 0.760
Grade of differentiation    1.149 0.563
 Well 47 46   
 Moderate 119 109   
 Poorly 81 92   
Lymph node resected 24.3±11.0 24.9±9.2 − 0.652 0.515
pTNM stage    1.354 0.508
 I 49 50   
 II 95 106   
 III 103 91   
  1. LC left colectomy, RC right colectomy, BMI body mass index, ASA American Society of Anesthesiologists