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Table 3 Comparative analysis of primary outcomes

From: Underwater versus conventional endoscopic mucosal resection for small size non-pedunculated colorectal polyps: a randomized controlled trial

Parameter

CEMR

UEMR

P value

Intention-to-treat analysis

n = 71

n = 71

 

Complete resection, n

62

59

 

Rate (%) [90% CI]

87.3 [80.7–94.0]

83.1 [75.6–90.6]

0.478a

Incomplete resection, n (%)

9 (12.7)

12 (16.9)

 

En-bloc, n

65

67

 

Rate (%) [90% CI]

91.5 [86.0–97.1]

94.4 [89.8–99.0]

0.512a

Piecemeal, n (%)

6 (8.5)

4 (5.6)

 

Per-protocol analysis

n = 71

n = 66

 

Complete resection, n

62

59

 

Rate (%) [90% CI]

87.3 [80.7–94.0]

89.4 [83.0–95.8]

0.706a

Incomplete resection, n (%)

9 (12.7)

7 (10.6)

 

En-bloc, n

65

62

 

Rate (%) [90% CI]

91.5 [86.0–97.1]

93.9 [89.0–98.9]

0.591 a

Piecemeal, n (%)

6 (8.5)

4 (6.1)

 
  1. CEMR conventional endoscopic mucosal resection, UEMR underwater endoscopic mucosal resection
  2. aChi-square test