Table 4.
Colonoscopy Findings from Earlier Studies
| Study | Study type | Adenoma or polyp prevalence by ethnicity, % | Polyp distribution, % | AAP prevalence, % | Study population demographics | ||||
|---|---|---|---|---|---|---|---|---|---|
|
|
|
||||||||
| Overall | African American | Hispanic | White/Other | Proximal | Distal | ||||
| Current study | Prospective | 14.0 | 24.3 | 12.1 | 11.6 | 7.7* | 9.9* | 4.5 | Uninsured; African American (37), Hispanic (141), White (43) |
| Chen et al.21 | Prospective | 16.4 | 12.0 | 19.0 | 11.0 | 8.8* | 20.3* | 2.0 | African American (98), Hispanic (211), Others (44) |
| Lee et al.24 | Prospective | 26.4 | 24.8 | 27.7 | NA | 20.2 | NA | 11.5 | African American (270), Hispanic (314) |
| Kanna et al.25 | Retrospective | 14.5 | NA | NA | NA | 53.2† | 46.8† | 4.3 | African American (485), Hispanic (3,475) |
| Lebwohl et al.26 | Retrospective | 20.3 | 26.0 | 22.0 | 19.0 | 9.2* | NA | 4.4 | African American (591), Hispanic (942), White (3,542) |
| Rex et al.27 | Prospective | 35.0 | 35.0 | NA | NA | 65.3† | 34.7† | 2.5 | African Americans (121) |
| Thornton et al.28,‡ | Prospective | 37.8 | 35.0 | NA | 38.0 | 20.1* | 18.7* | NA | African Americans (3,195) |
| Nouraie et al.29 | Retrospective | 83.9† | NA | NA | NA | 36.1† | 34† | NA | 90% African American (review of 5,013 colorectal polyps) |
| Thoma et al.30 | Retrospective | 47.0 | NA | 45.0 | 48.0 | 19* | NA | 4.0 | Hispanic (607), White (1,251) |
| Zheng et al.33 | Retrospective | 19.0 | 21.9 | 14.8 | 24.0 | 45† | 42† | NA | African American (635), Hispanic (738), White (283) |
AAP, adenomas with advanced pathology; NA, not applicable.
*
As percentage of total patients;
†
As percentage of total polyps;
‡
Data for polyp histological subtype not available.