TABLE 3.
Unadjusted rates of colonoscopy-related adverse events per 1000 outpatient procedures and univariate associations among polypectomy technique, endoscopist volume, and facility type
| Rates (95% CI) | No. of adverse events | No. of procedures | |
|---|---|---|---|
| Cumulative GI adverse events | 1.98 (1.93-2.04) | 4595 | 2,315,126 |
| GI bleeding | 1.65 (1.60-1.70) | 3822 | 2,315,126 |
| Colonoscopic perforation | 0.33 (0.31-0.36) | 773 | 2,315,126 |
| Simple colonoscopy | 0.49 (0.45-0.54) | 507 | 1,027,515 |
| Cold biopsy forceps | 0.60 (0.52-0.70) | 176 | 292,667 |
| Polypectomy by ablation | 2.15 (1.77-2.59) | 112 | 52,024 |
| Polypectomy by hot biopsy or bipolar cautery forceps | 3.15 (2.96-3.34) | 1089 | 346,150 |
| Polypectomy by snares | 4.32 (4.12-4.53) | 1743 | 403,077 |
| Complex colonoscopy | 5.00 (4.69-5.32) | 968 | 193,693 |
| Endoscopist volume | |||
| <300 | 2.27 (2.15-2.40) | 1324 | 582,614 |
| ≥300 | 1.89 (1.82-1.95) | 3271 | 1,732,512 |
| Facility type | |||
| ASC | 2.08 (2.00-2.16) | 2653 | 1,276,005 |
| HOPD | 1.87 (1.79-1.95) | 1942 | 1,039,121 |
CI, Confidence interval; ASC, ambulatory surgery center; HOPD, hospital outpatient department.