Sedation Is Associated with Higher Polyp and Adenoma Detection Rates during Colonoscopy: A Retrospective Cohort Study
Table 1
Characteristics of the patients.
Variable
All patients ()
No-sedation ()
Sedation ()
-value
Age (years)
<0.001
Sex
Male
6547 (51.5%)
1910 (55.1%)
4637 (50.1%)
<0.001
Female
6169 (48.5%)
1556 (44.9%)
4613 (49.9%)
Year of colonoscopy
2017
3356 (26.4%)
1040 (30%)
2316 (25%)
<0.001
2018
4157 (32.7%)
1225 (35.3%)
2932 (31.7%)
2019
5010 (39.4%)
1157 (33.4%)
3853 (41.7%)
2020
193 (1.5%)
44 (1.3%)
149 (1.6%)
Time of colonoscopy
AM (8–12)
4282 (33.7%)
42 (1.2%)
4240 (45.8%)
<0.001
PM (12–17)
8434 (66.3%)
3424 (98.8%)
5010 (54.2%)
Reason for colonoscopy
Unknown
57 (0.4%)
4 (0.1%)
53 (0.6%)
<0.001
Screening
2188 (17.2%)
344 (9.9%)
1844 (19.9%)
Diagnosis
8886 (69.9%)
2685 (77.5%)
6201 (67.0%)
Others
1585 (12.5%)
433 (12.5%)
1152 (12.5%)
Endoscopist factors
Volumea < 300
1372 (10.8%)
90 (2.6%)
1282 (13.9%)
<0.001
300 ≤ volume < 700
7218 (56.8%)
1980 (57.1%)
5238 (56.6%)
700 ≤ volume
4126 (32.4%)
1396 (40.3%)
2730 (29.5%)
Experienceb < 3
1641 (12.9%)
696 (20.1%)
945 (10.2%)
3 ≤ experience < 7
7105 (55.9%)
2327 (67.1%)
4778 (51.7%)
7 ≤ experience
3970 (31.2%)
443 (12.8%)
3527 (38.1%)
Score of BBPS
<0.001
Total number of biopsies
<0.001
Number of polyps per colonoscopy
<0.001
Treatment
No treatment
5659 (44.5%)
1767 (51%)
3892 (42.1%)
<0.001
Deal with biopsy forceps
5170 (40.7%)
1385 (40%)
3785 (40.9%)
Polypectomy with other methodc
1887 (14.8%)
314 (9.1%)
1573 (17%)
Withdrawal time (minutes)
<0.058
No treatment
Deal with biopsy forceps
Polypectomy with other method
Group of withdrawal time (minutes)
<6
3250 (25.6%)
786 (22.7%)
2464 (26.6%)
<0.001
6–12n
7202 (56.6%)
2060 (59.4%)
5142 (55.6%)
>12
2264 (17.8%)
620 (17.9%)
1644 (17.8%)
BBPS: the Boston Bowel Preparation Scale score. aVolume: the number of colonoscopies performed by endoscopists annually. bExperience: years since completing colonoscopy independently. cIncluding polypectomy with snare wire, argon plasma coagulation, or electrocoagulation.
