Efficacy of thrombin spray combined with clip closure after colorectal endoscopic mucosal resection and endoscopic submucosal dissection

Table 2 Comparison of postoperative bleeding incidence between two groups, n (%)

Bleeding type	Study group (n = 59)	Control group (n = 61)	Statistical method	P value
Immediate postoperative bleeding	1 (1.7)	2 (3.3)	Fisher’s exact test	1
Delayed bleeding	0 (0.0)	1 (1.6)	Fisher’s exact test	1
Total bleeding	1 (1.7)	3 (4.9)	Fisher’s exact test	0.622

Immediate postoperative bleeding refers to bleeding occurring within 24 hours postoperatively; delayed bleeding refers to bleeding occurring from 24 hours to 30 days postoperatively; Fisher’s exact test was used for immediate postoperative bleeding and delayed bleeding due to theoretical frequency < 5.