Table:
Association between colonoscopy position and adenoma detection, polyp detection, and withdrawal time
| Colonoscopy position (nth colonoscopy of the day) | Number of colonoscopies | Adenoma Detection Rate (%, 195% CI) | Polyp detection rate (%, 95% CI) |
Wthdrawal time* (minutes, 95% CI) | Adenoma Detection Rate adjusted for patient characteristics (%, 95% CI) |
|---|---|---|---|---|---|
| 1 | 20,348 | 29.5 (28.9–30.1) | 49.9 (49.2–50.6) | 11.6 (11.4–11.9) | 29.8 (29.1–30.4) |
| 2 | 16,885 | 30.2 (29.5–30.8) | 50.2 (49.4–50.9) | 11.4 (11.2–11.7) | 30.1 (29.4–30.8) |
| 3 | 13,898 | 30.0 (29.2–30.7) | 50.0 (49.2–50.8) | 11.1 (10.9–11.4) | 29.8 (29.0–30.5) |
| 4 | 11,037 | 30.2 (29.3–31.0) | 49.1 (48.2–50.0) | 11.2 (10.9–11.5) | 29.8 (28.9–30.6) |
| 5 | 8,111 | 30.8 (29.8–31.8) | 48.6 (47.5–49.7) | 10.8 (10.5–11.1) | 30.2 (29.2–31.2) |
| 6 | 5,765 | 30.3 (29.1–31.5) | 47.3 (46.0–48.6) | 10.2 (9.8–10.6) | 29.7 (28.6–30.9) |
| 7 | 3,851 | 30.5 (29.1–32.0) | 46.5 (45.0–48.1) | 9.7 (9.3–10.1) | 30.7 (29.2–32.1) |
| 8 | 2,520 | 27.7 (26.0–29.5) | 45.0 (43.1–46.9) | 9.7 (9.2–10.3) | 28.0 (26.2–29.8) |
| 9 | 1,647 | 27.4 (25.3–29.6) | 44.9 (42.5–47.3) | 9.6 (8.9–10.3) | 28.2 (26.0–30.5) |
| 10+ | 2,562 | 27.5 (25.7–29.2) | 43.4 (41.5–45.4) | 9.3 (8.6–9.9) | 28.5 (26.7–30.3) |
*
Data on withdrawal time were only available at one site and available for 12,637 colonoscopies.