| Characteristic | No. (%) of patients† n = 546 467 | |
|---|---|---|
| Patient | ||
| Year of inclusion | ||
| 2000 | 44 376 | (8.1) |
| 2001 | 52 555 | (9.6) |
| 2002 | 59 036 | (10.8) |
| 2003 | 60 007 | (11.0) |
| 2004 | 67 536 | (12.4) |
| 2005 | 74 140 | (13.6) |
| 2006 | 87 526 | (16.0) |
| 2007 | 101 291 | (18.5) |
| Age, yr | ||
| 50–54 | 139 331 | (25.5) |
| 55–59 | 126 750 | (23.2) |
| 60–64 | 100 667 | (18.4) |
| 65–69 | 79 504 | (14.5) |
| 70–74 | 60 459 | (11.1) |
| 75–79 | 39 756 | (7.3) |
| Sex | ||
| Male | 243 659 | (44.6) |
| Female | 302 808 | (55.4) |
| Comorbidity (JH ADG), median (IQR) | 5 | (4−6) |
| Socioeconomic status* | ||
| Urban bottom 20th ‰ | 62 218 | (11.4) |
| Urban 60th–80th ‰ | 79 618 | (14.6) |
| Urban 40th–60th ‰ | 88 385 | (16.2) |
| Urban 20th–40th ‰ | 102 214 | (18.7) |
| Urban top 20th ‰ | 139 977 | (25.6) |
| Rural | 73 650 | (13.5) |
| Endoscopy | ||
| Setting | ||
| Community hospital | 365 620 | (66.9) |
| Academic hospital | 77 236 | (14.1) |
| Nonhospital | 103 470 | (18.9) |
| Open access | 188 175 | (34.4) |
| Endoscopist | ||
| Male | 501 808 | (91.8) |
| Specialty | ||
| General surgeon | 290 412 | (53.1) |
| Gastroenterologist | 123 268 | (22.6) |
| Internist | 122 701 | (22.5) |
| Other | 10 086 | (1.8) |
| Main practice location | ||
| Hospital | 395 497 | (72.4) |
| Private clinic/office | 70 730 | (12.9) |
| Mixed | 80 240 | (14.7) |
| 1-year colonoscopy volume, median (IQR) | 501 | (318–716) |
| 1-year cecal intubation rate, median (IQR) | 0.97 | (0.94−0.99) |
| 1-year polyp removal rate, median (IQR) | 0.22 | (0.15−0.29) |
Note: CI = confidence interval, IQR = interquartile range, JH ADG = John Hopkins aggregated diagnosis groups. *No data for socioeconomic status in 456 (0.1%) patients. Socioeconomic status is represented as the median neighbourhood income quintile within the patient’s postal code area unless rural. †Unless otherwise specified.