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| Variable | Category | No HD scope (n = 198) n (%) | HD scope (n = 132) n (%) | P value |
| HD, high definition. | ||||
| Bowel prep | Inadequate | 16 (8%) | 2 (2%) | <0.001 |
| Adequate | 87 (44%) | 51 (39%) | ||
| Good | 56 (28%) | 30 (23%) | ||
| Excellent | 39 (20%) | 49 (37%) | ||
