Risk factors of electrocoagulation syndrome after esophageal endoscopic submucosal dissection

Table 1 Baseline patient and tumor characteristics n (%)

Characteristic	Value (n = 51)
Number of patients	51
Sex
Male	46 (90.2)
Female	5 (9.8)
Age, mean ± SD, yr	63.6 ± 9.4
Comorbidity
Hypertension	21 (41.2)
Diabetes mellitus	7 (13.7)
Chronic kidney disease	1 (2.0)
Smoker	42 (82.4)
Alcohol consumption	40 (78.4)
Gross appearance of tumor
Polypoid	1 (2.0)
Elevated	8 (15.7)
Flat	40 (78.4)
Depressed	2 (3.9)
Location of tumor
Upper third of esophagus	3 (5.9)
Middle third of esophagus	20 (39.2)
Lower third of esophagus	24 (47.1)
Esophagogastric junction	4 (7.8)
Circumferential extension, median (IQR), %	40 (30-60)
Pathology of tumor
Dysplasia	14 (27.5)
Squamous cell carcinoma	37 (72.5)
Invasion depth of tumor
Mucosa	38 (74.5)
Submucosa	13 (25.5)
Resected area, median (IQR), cm2	4.5 (2.9-8.2)
Procedure time, median (IQR), min	40 (27-69)
Muscle layer exposure
Absent	27 (52.9)
Present	24 (47.1)
En bloc resection	51 (100)
Antibiotics use	23 (45.1)
Post procedure BT, mean ± SD, °C	36.6 ± 0.5
Post procedure WBC, median (IQR), counts/μL	10800 (9340-12600)
Post procedure pain scale score, median (IQR)	5 (3-6)
Duration of hospitalization, median (IQR), d	4 (3-6)
Post ESD electrocoagulation syndrome
Absent	18 (35.3)
Mild	24 (47.1)
Severe	9 (17.6)

SD: Standard deviation; IQR: Interquartile range; BT: Body temperature; WBC: White blood cell.