Table 3.
Characteristics of colonoscopy exam among control subjects performed at the VA
| Characteristics | Overall | Screening | Surveillance | Other a |
|---|---|---|---|---|
| VA Procedure, % | 290 (100) | 97 (33.4) | 104 (35.9) | 89 (30.7) |
| Prep Quality, % | ||||
| Excellent/Good | 205 (70.7) | 73 (75.3) | 72(69.2) | 60(67.4) |
| Fair/Adequate | 51 (17.6) | 15 (15.5) | 21 (20.2) | 15 (16.8) |
| Poor/Inadequate | 16 (5.5) | 5 (5.2) | 6 (5.8) | 5 (5.6) |
| Not mentioned | 18 (6.2) | 4 (4.1) | 5 (4.8) | 9 (10.1) |
| Cecum Reached, % | ||||
| Overall | 271 (93.4) | 92 (94.8) | 99 (95.2) | 78 (87.6) |
| Prep quality ≥ fair | 251/256 (98.0) | 85/88 (96.6) | 93/93 (100) | 70/75 (93.3) |
| Prep quality was poor or inadequate | 8/16 (50.0) | 4/5 (80.0) | 1/6 (16.7) | 4/5 (80.0) |
| Prep not mentioned | 12/18 (66.7) | 3/4 (75.0) | 5/5 (100) | 4/9 (44.4) |
| Polypectomy rate, % | ||||
| Any adenoma b | 131 (45.2) | 40 (41.2) | 58 (55.8) | 33 (37.1) |
| Hyperplastic polyp c | 86 (29.7) | 25 (25.8) | 35 (33.6) | 26 (29.2) |
| Advanced histology d | 8 (2.8) | 1 (1.0) | 2 (1.9) | 5 (5.6) |
| Advanced neoplasia e | 42 (14.4) | 18 (18.6) | 15 (14.4) | 9 (10.1) |
Other included anemia, hematochezia, FOBT, and multiple other indications (melena, constipation, diarrhea, weight loss).
Any adenoma includes any size polyp with adenomatous features or more advanced histological features. This excluded hyperplastic polyps.
Of the 86 patients with any hyperplastic polyps, there were a total of 111 hyperplastic polyps. Location included the cecum (5), ascending (7), hepatic flexure (1), transverse (12), splenic (1), descending (8), sigmoid (29), rectum (37), rectosigmoid (14). Six polyps were 10 mm or larger. Half were located proximal to the sigmoid colon.
Advanced histology includes tubulovillous adenoma or high grade dysplasia
Advanced neoplasia includes polyps greater than 10 mm in size with adenomatous features or polyps of any size with advanced histological features. This excluded hyperplastic polyps.