Characteristic | Screening colonoscopies included in the study (n=352 685) | PSCRC (n=241) |
Characteristics of the study cohort | ||
Sex—women, n(%) | 179 767 (50.97) | 119 (49.38) |
Age—years, median (IQR, range) | 60 (54–68) | 67 (59–74) |
Follow-up time—months, median (IQR) | 55.43 (33.87–85.7) | |
Time between screening colonoscopy and first hospitalisation due to colorectal cancer, median (IQR) | 24.5 (12.97–39.87) | |
Cecum reached, n (%) | 342 238 (97.04) | 224 (92.95) |
Complications, n (%) | 739 (0.21) | 0 |
Bleeding | 300 (0.09) | |
Cardiopulmonary | 297 (0.08) | |
Perforation | 39 (0.01) | |
Others | 103 (0.03) | |
Risk group, n (%) | ||
High | 37 044 (10.5) | 59 (24.48) |
Low | 44 661 (12.66) | 22 (9.13) |
Hyperplastic polyps | 50 739 (14.39) | 30 (12.45) |
Negative Colonoscopy | 220 241 (62.45) | 130 (53.94) |
Characteristics of the physicians with 30 or more examinations, n (%): 329 (85) | ||
Total, n (%): 387 (100) | ||
No of colonoscopies per physician, median (IQR) | 582 (238–1276) | |
ADR (%)—dynamically estimated for each observation based on all prior examinations available by the same physician, median (IQR) | 21.84 (16.09–28.72) | |
AADR (%)—dynamically estimated for each observation based on all prior examinations available by the same physician, median (IQR) | 5.75 (3.64–8.33) | |
hrAADR (%)—dynamically estimated for each observation based on all prior examinations available by the same physician, median (IQR) | 8.32 (5.17–12.54) |
High-risk group: adenoma ≥10 mm, or with high-grade dysplasia, or villous or tubulovillous histology, or a serrated lesion ≥10 mm or with dysplasia, or colonoscopies with ≥3 lesions.
Low-risk group: 1 or two tubular adenomas <10 mm, or with low-grade dysplasia, or serrated lesions<10 mm, or without dysplasia.
AADR, advanced adenoma detection rate; ADR, adenoma detection rate; hrADR, high-risk adenoma detection rate; PSCRC, postscreening colorectal cancer.