Impact of looping on premalignant polyp detection during colonoscopy

Table 1 Characteristics of the study subjects

Characteristics
n	12259
Age, mean (SD), yr	53.6 (12.2)
Male sex, %	50.7
Looping, none/mild/severe, n	5532/4399/2253
Insertion time, mean (SD), min	4.57 (2.66)
Withdrawal time, mean (SD), min	13.87 (4.19)
Experienced endoscopist, %	70.4
Polyp detection
Adenoma DR, %	44.7
Advanced adenoma DR, %	2.0
High-risk adenoma DR, %	9.9
CSSP DR, %	8.9
SSL DR, %	3.5
Number of adenomas, mean (SD), n	0.82 (1.25)
Number of SSLs, mean (SD), n	0.04 (0.24)

SD: Standard deviation; DR: Detection rate; CSSP: Clinically significant serrated polyp; SSL: Sessile serrated lesion.