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Table 1 Patient characteristics and univariable analysis of the risk of postoperative bowel obstruction

From: Risk factors of early postoperative bowel obstruction for patients undergoing selective colorectal surgeries

Variables No postoperative ileus Postoperative ileus χ2/t P value
N (%) n = 1284 n = 153
Female 615 (47.90) 69 (45.10) 0.429 0.512
Age 63.92 ± 13.16 66.97 ± 12.02 0.022 0.004
BMI 23.64 ± 3.55 23.09 ± 3.24 0.603 0.051
Right colectomy 436 (33.96) 47 (30.72) 0.642 0.423
Transverse colectomy 60 (4.67) 11 (7.19) 1.844 0.175
Left colectomy 124 (9.66) 18 (11.76) 0.682 0.409
Sigmoid colectomy 450 (35.05) 54 (35.29) 0.004 0.952
Rcctectomy 289 (22.51) 34 (22.22) 0.006 0.936
Malignant 1224 (95.33) 148 (96.73) 0.625 0.429
Hypertension 798 (62.15) 91 (59.48) 0.414 0.520
CHD 168 (13.08) 24 (15.69) 0.800 0.371
Arrhythmia 85 (6.62) 11 (7.19) 0.071 0.790
Cerebral infarction 106 (8.26) 14 (9.15) 0.143 0.705
Encepalorrhagia 8 (0.62) 2 (1.31) 0.201 0.654
Hypothyroidism 23 (1.79) 8 (5.23) 6.111 0.013
Diabetes mellitus 234 (18.22) 31 (20.26) 0.377 0.539
COPD 50 (3.89) 15 (9.80) 11.056 0.001
Renal inadequacy 33 (2.57) 4 (2.61) 0.000 1.000
Hyperlipidemia 258 (20.09) 37 (24.18) 1.401 0.236
Hepatic inadequacy 17 (1.32) 3 (1.96) 0.073 0.787
Blood disease 12 (0.93) 1 (0.65) 0.000 1.000
History of alcohol 169 (13.16) 24 (15.69) 0.749 0.387
History of smocking 218 (16.98) 28 (18.30) 0.169 0.681
Preoperative chemotherapy 52 (4.05) 6 (3.92) 0.006 0.939
Preoperative anemia 565 (44.00) 73 (47.71) 0.762 0.383
Preoperative ileus 249 (19.39) 33 (21.57) 0.421 0.810
ASA I 145 (11.29) 18 (11.76) 7.556 0.047*
ASA II 937 (72.98) 98 (64.05)   
ASA III 192 (14.95) 35 (22.88)   
ASA IV 10 (0.78) 2 (1.31)   
Soapsuds enema for bowel preparation 133 (10.36) 18 (11.76) 0.288 0.592
Oral laxatives for bowel preparation 1178 (91.74) 135 (88.24) 2.135 0.144
Glycerin enema for bowel preparation 212 (16.51) 22 (14.38) 0.456 0.500
Oral antibiotics for bowel preparation 58 (4.51) 4 (2.61) 1.199 0.274
Laparotomy 644 (50.16) 57 (37.25) 9.107 0.003
Curative resection 1126 (87.69) 132 (86.27) 0.253 0.615
Operative time (Min) 208.17 ± 67.78 205.74 ± 68.67 0.133 0.678
Preoperative antibiotics 80 (6.23) 17 (11.11) 5.173 0.023
Preoperative fortified antibiotics 45 (3.50) 12 (7.84) 6.755 0.009
Postoperative fortified antibiotics 536 (41.74) 76 (49.67) 3.515 0.061
Duration of antibiotics (day) 6.68 ± 3.62 11.92 ± 9.10 213.504 0.000
Time to postoperative feeding (day) 5.48 ± 1.75 8.07 ± 4.46 222.496 0.000
Using probiotics 348 (27.10) 54 (35.29) 4.553 0.033
Probiotic indications 505 (39.33) 150 (98.04) 189.965 0.000
Postoperative analgesia 1284 153 0.149 0.930*
None 71 (5.53) 7 (4.58)   
Opioids 1131 (88.08) 137 (8.95)   
Opioids and NSAIDs1 69 (5.37) 8 (5.23)   
NSAIDs 13 (1.01) 1 (0.65)   
Duration of analgesia 2.77 ± 0.98 2.99 ± 1.49 0.040 0.074
Hypoproteinemia 1067 (89.10) 134 (87.58) 2.001 0.157
Extraction of gastric tube (day) 1.74 ± 1.48 3.04 ± 9.12 86.873 0.085
Extraction of drainage tube (day) 8.77 ± 7.11 11.41 ± 5.24 5.618 0.000
  1. BMI: body-mass index, CHD: coronary heart disease, COPD: chronic obstructive pulmonary disease, ASA: American Society of Anesthesiologists, NSAIDs: non-steroidal anti-inflammatory drugs
  2. *Comparison between two groups, *group and*group…, the difference between groups was statistically significant (P < 0.01 or P < 0.05)