Table 1a.
Distribution of study subject (N=1,387) characteristics with a normal colonoscopy by bowel preparation quality
| Normal colonoscopy | ||||
|---|---|---|---|---|
| Characteristic (%) | Excellent/good prep quality | Fair prep quality | Poor prep quality | P value |
| Age, years | ||||
| 50–59 | 793 (82.1) | 121 (12.5) | 52 (5.4) | |
| 60–69 | 273 (80.8) | 44 (13.0) | 21 (6.2) | 0.58 |
| 70 + | 65 (78.3) | 15 (18.1) | 3 (3.6) | |
| Gender | ||||
| Male | 569 (80.6) | 103 (14.6) | 34 (4.8) | 0.12 |
| Female | 562 (82.5) | 77 (11.3) | 42 (6.2) | |
| Race/ethnicity | ||||
| White | 886 (82.3) | 138 (12.8) | 52 (4.8) | |
| African American | 77 (73.3) | 17 (16.2) | 11 (10.5) | 0.10 |
| Other | 85 (80.2) | 14 (13.2) | 7 (6.6) | |
| BMI (kg/m2) | ||||
| < 25 | 313 (84.8) | 39 (10.6) | 17 (4.6) | |
| ≥25– < 30 | 427 (82.9) | 63 (12.2) | 25 (4.9) | 0.05 |
| ≥30– < 35 | 198 (75.9) | 48 (18.4) | 15 (5.8) | |
| ≥35 | 126 (77.3) | 24 (14.7) | 13 (8.0) | |
| Narcotics use | 96 (8.5) | 25 (14.0) | 13 (17.1) | < 0.01 |
| TCA use | 21 (1.9) | 7 (3.9) | 3 (4.0) | 0.13 |
| Diabetic | 97 (8.6) | 39 (21.9) | 21 (27.6) | < 0.001 |
| GI fellow present | 198 (17.5) | 48 (26.7) | 14 (18.4) | 0.01 |
| Bowel prep type | ||||
| 8L PEG-3350 | 176 (77.9) | 40 (17.7) | 10 (4.4) | |
| 4L PEG-3350 | 481 (79.4) | 82 (13.5) | 43 (7.1) | 0.02 |
| MiraLAX/Gatorade | 273 (86.7) | 31 (9.8) | 11 (3.5) | |
| Other | 162 (83.9) | 20 (10.4) | 11 (5.7) | |
| Endoscopy site (%) | ||||
| HOPD | 187 (77.9) | 36 (15.0) | 17 (7.1) | |
| ASC | 742 (84.4) | 92 (10.5) | 45 (5.1) | < 0.01 |
| VA endoscopy unit | 202 (75.4) | 52 (19.4) | 14 (5.2) | |
| Procedure difficulty | ||||
| Not difficult | 988 (83.2) | 138 (11.6) | 62 (5.2) | < 0.001 |
| Some difficulty | 96 (66.7) | 36 (25.0) | 12 (8.3) | |
ASC, ambulatory surgery center; BMI, body mass index; GI, gastrointestinal; HOPD, hospital outpatient department; PEG, polyethylene glycol; prep, preparation; TCA, tricyclic antidepressant; VA, veterans administration.