Risk factors of fever following endoscopic radiofrequency ablation for early esophageal squamous cell carcinoma and precancerous lesions

Table 2 Univariate analysis of fever after endoscopic radiofrequency ablation

	No fever	Fever	Statistics	P value
Ablation length (cm)	12.45 ± 4.57	16.10 ± 3.21	-2.496	0.019
Operate time (min)	57.00 ± 14.96	59.89 ± 16.97	-0.464	0.646
Postoperative fasting time (d)	2.91 ± 0.94	2.28 ± 0.67	2.109	0.044
Whether to use hormones after surgery (n)				0.646
No	8	15
Yes	3	3
Whether antibiotics should be used after surgery (n)				0.449
No	8	10
Yes	3	8
The pathology type (n)				0.719
Low-grade intraepithelial neoplasia	6	9
High-grade intraepithelial neoplasia	5	7
Early esophageal squamous cell carcinoma	0	2