Appendix Table 1.
Adenoma detection rate by colonoscopy type in pre and post reporting periods. Sensitivity analyses where colonoscopies from transition period were not excluded. This analysis was conducted to assess whether results were sensitive to exclusion of transition period.
| Quality measures | All Colonoscopies (n=20,040) | Colonoscopies before Public Reporting (n=3,952) | Colonoscopies after Public Reporting (n=16,088) | P value |
|---|---|---|---|---|
| All Colonoscopies | ||||
| Polyp removed during colonoscopy | 10,548 (52.6%) | 1,902 (48.1%) | 8,646 (53.7%) | <0.001 |
| Adenoma removed during colonoscopy | 6,905 (34.5%) | 1,092 (27.6%) | 5,813 (36.1%) | <0.001 |
| Advanced adenoma removed^ | 2,448 (12.2%) | 415 (10.5%) | 2,033 (12.6%) | <0.001 |
| Large adenoma removed | 2,143 (10.7%) | 355 (9.0%) | 1,788 (11.1%) | <0.001 |
| Villous, dysplastic changes, or carcinoma | 772 (3.9%) | 149 (3.8%) | 623 (3.9%) | 0.765 |
| Adenoma to polyp ratio | 0.65 | 0.57 | 0.67 | <0.001 |
| Limited to Screening Colonoscopies | ||||
| Polyp removed during colonoscopy | 4,178 (57.0%) | 568 (52.5%) | 3,610 (57.7%) | 0.001 |
| Adenoma removed during colonoscopy | 2,633 (35.9%) | 306 (28.3%) | 2,327 (37.2%) | <0.001 |
| Advanced adenoma removed^ | 819 (11.2%) | 89 (8.2%) | 730 (11.7%) | 0.001 |
| Large adenoma removed | 735 (10.0%) | 77 (7.1%) | 658 (10.5%) | 0.001 |
| Villous, dysplastic changes, or carcinoma | 230 (3.1%) | 30 (2.8%) | 200 (3.2%) | 0.459 |
| Adenoma to polyp ratio | 0.63 | 0.54 | 0.64 | <0.001 |
| Other Quality Measures | ||||
| Withdrawal time reported | 3,296 (16.4%) | 62 (1.6%) | 3,234 (20.1%) | <0.001 |
| ASA classification of patient reported | 11,253 (56.2%) | 3 (0.1%) | 11,250 (69.9%) | <0.001 |
| Informed consent documented | 20,037 (100%) | 3,950 (99.9%) | 16,087 (100%) | 0.041 |
| Quality of colonoscopy prep reported | 20,040 (100%) | 3,952 (100%) | 16,088 (100%) | NS |
^
Adenoma size ≥ 10mm or pathology consistent with villous component or dysplastic changes