Research Article
Sedation Is Associated with Higher Polyp and Adenoma Detection Rates during Colonoscopy: A Retrospective Cohort Study
Table 5
Characteristics in the full cohort and propensity score-based matched cohort.
| | Full cohort | Standardized difference | Matched cohort | Standardized difference | -value | | No-sedation | Sedation | No-sedation | Sedation |
| | Number of patients | 3466 | 9250 | | 3407 | 3407 | | | | Age (years) | | | 0.119 | | | 0.015 | 0.941 | | 45–49 | 567 (16.4) | 1515 (16.4) | | 567 (16.6) | 576 (16.9) | | | | 50–59 | 1383 (39.9) | 4019 (43.4) | | 1369 (40.2) | 1344 (39.4) | | | | 60–69 | 1116 (32.2) | 2953 (31.9) | | 1111 (32.6) | 1121 (32.9) | | | | 70–75 | 400 (11.5) | 763 (8.2) | | 360 (10.6) | 366 (10.7) | | | | Sex, female | 1556 (44.9) | 4613 (49.9) | 0.100 | 1553 (45.6) | 1558 (45.7) | 0.003 | 0.903 | | Reason for colonoscopy | | | 0.300 | | | 0.011 | 0.976a | | Unknown | 4 (0.1) | 53 (0.6) | | 4 (0.1) | 5 (0.1) | | | | Screening | 344 (9.9) | 1844 (19.9) | | 343 (10.1) | 335 (9.8) | | | | Diagnosis | 2685 (77.5) | 6201 (67.0) | | 2629 (77.2) | 2637 (77.4) | | | | Others | 433 (12.5) | 1152 (12.5) | | 431 (12.7) | 430 (12.6) | | | | Endoscopist factors | | | 0.443 | | | 0.042 | 0.222 | | Volumea < 300 | 90 (2.6) | 1282 (13.9) | | 79 (2.3) | 59 (1.7) | | | | 300 ≤ volume < 700 | 1980 (57.1) | 5238 (56.6) | | 1962 (57.6) | 1965 (57.7) | | | | 700 ≤ volume | 1396 (40.3) | 2730 (29.5) | | 1366 (40.1) | 1383 (40.6) | | | | Experienceb < 3 | 696 (20.1) | 945 (10.2) | 0.626 | 665 (19.5) | 660 (19.4) | 0.023 | 0.630 | | 3 ≤ experience < 7 | 2327 (67.1) | 4778 (51.7) | | 2299 (67.5) | 2277 (66.8) | | | | 7 ≤ experience | 443 (12.8) | 3527 (38.1) | | 443 (13.0) | 470 (13.8) | | |
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aVolume: the number of colonoscopies performed by endoscopists annually.
bExperience: years since completing colonoscopy independently.
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