Nomogram to predict prolonged postoperative ileus after gastrectomy in gastric cancer

Table 1 Patient, operation, tumor, and postoperative characteristics

Characteristic	Category	n = 162	Percentage (%)
Sex	Female	38	23.46
	Male	124	76.54
Age(yr)	Range 30-89	—	—
	Mean 59.5, median 59.0	—	—
BMI (kg/m2)	Range 22.30-26.80	—	—
	Mean 24.66, median 24.95	—	—
Previous abdominal surgery	No	131	80.86
	Yes	31	19.14
Operation method	Open surgery	63	38.89
	Laparoscopic surgery	99	61.11
Operation time (min)	Range 120-433	—	—
	Mean 236.4, median 230.0	—	—
Intraoperative blood loss (mL)	Range 10-1800	—	—
	Mean 229.4, median 200.0	—	—
Blood transfusion	No	131	80.86
	Yes	31	19.14
Surgical procedure	Proximal gastrectomy	21	12.96
	Distal gastrectomy	56	34.57
	Total gastrectomy	85	52.47
Lymph node dissection	D1+	40	24.69
	D2	122	75.31
Tumor stage	I	39	24.07
	II	50	30.86
	III	72	44.44
	IV	1	0.62
Postoperative body temperature (°C)	Range 36.4-39.1	—	—
	Mean 37.6, median 37.5	—	—
Postoperative WBC count (×109/L)	Range 5.43-22.02	—	—
	Mean 12.76, median 12.70	—	—
Postoperative albumin (g/L)	Range 25.5-40.3	—	—
	Mean 31.93, median 31.80	—	—
Postoperative K+ (mmol/L)	Range 2.67-5.15	—	—
	Mean 3.75, median 3.74	—	—
Postoperative opioid analgesic	No	100	61.73
	Yes	62	38.27
PPOI	No	130	80.25
	Yes	32	19.75

Data are presented as number of patients unless indicated otherwise. BMI: Body mass index; WBC: White blood cell; PPOI: Prolonged postoperative ileus.