TABLE 2.
Distribution of bowel preparation process–related variables, by compliance status to split-dosing recommendations (N = 462)
| Bowel preparation characteristics | Split dosing | Total | P value* | |
|---|---|---|---|---|
| Compliant (n = 391) | Noncompliant (n = 71) | |||
| First colonoscopy | 248 (63.4) | 38 (55.1) | 286 (62.2) | .19 |
| Endoscopy at academic hospital unit† | 221 (56.5) | 33 (46.5) | 254 (55.0) | .12 |
| No one talked about liquid laxative‡ | 193 (49.4) | 28 (39.4) | 221 (47.8) | .12 |
| No discussion about food before preparation | 244 (62.9) | 48 (67.6) | 292 (63.6) | .45 |
| No handout about how to prepare | 113 (29.2) | 23 (32.9) | 136 (29.8) | .54 |
| Looked at instructions for the preparation | ||||
| Yesterday | 24 (6.2) | 6 (8.5) | 30 (6.6) | |
| 2–6 days ago | 124 (32.0) | 124 (33.8) | 148 (32.3) | |
| 7–14 days ago | 86 (22.2) | 17 (23.9) | 103 (22.5) | |
| 15–21 days ago | 36 (9.3) | 5 (7.0) | 41 (9.0) | |
| >21 days ago or never | 117 (30.2) | 19 (26.8) | 136 (29.7) | .88 |
| Bought liquid/pill laxatives to prepare | ||||
| Yesterday | 40 (10.3) | 8 (11.3) | 48 (10.4) | |
| 2–6 days ago | 237 (60.9) | 35 (49.3) | 272 (59.1) | |
| 7–14 days ago | 57 (14.7) | 14 (19.7) | 71 (15.4) | |
| 15–21 days ago | 9 (2.3) | 2 (2.8) | 11 (2.4) | |
| >21 days ago or never | 46 (11.8) | 12 (16.9) | 58 (12.6) | .45 |
| Followed laxative instructions exactly | 265 (67.8) | 39 (54.9) | 304 (65.8) | .04 |
| Bowel preparation type | ||||
| PEG-EL | 133 (34.2) | 37 (52.1) | 170 (37.0) | |
| MiraLAX PEG 3350 + Gatorade | 237 (60.9) | 28 (39.4) | 265 (57.6) | |
| Other§ | 19 (4.9) | 6 (8.5) | 25 (5.4) | .003 |
| Last time ate/drank was before noon yesterday | 325 (83.6) | 56 (80.0) | 381 (83.0) | .47 |
| No. of glasses of fluid drank yesterday║ | ||||
| 0 | 20 (5.2) | 9 (13.0) | 29 (6.4) | |
| 1–6 | 178 (46.5) | 42 (60.9) | 220 (48.7) | |
| >6 | 185 (48.3) | 18 (26.1) | 203 (44.9) | .001 |
| No. of glasses of fluid drank today║ | ||||
| 0 | 119 (30.6) | 38 (55.1) | 157 (34.3) | |
| 1–6 | 248 (63.8) | 28 (40.6) | 276 (60.3) | |
| >6 | 22 (5.7) | 3 (4.4) | 25 (5.5) | <.001 |
| Amount of liquid or pill laxative taken, % |
||||
| >90 | 355 (90.8) | 58 (82.9) | 413 (89.6) | |
| 75–90 | 21 (5.4) | 9 (12.9) | 30 (6.5) | |
| 50–75 | 15 (3.8) | 3 (4.3) | 18 (3.9) | .06 |
| Colonoscopy appointment was before 10:30 am | 172 (44.0) | 47 (66.2) | 219 (47.4) | .001 |
All values are number (percentage) of those split-dose compliant or noncompliant), unless otherwise specified.
PEG-EL, Polyethylene glycol electrolyte.
From testing differences in the distribution of the patient characteristics between patients compliant and noncompliant with split-dose guidelines; based on a t test for continuous variables and χ2 test for categorical variables. No adjustments for multiple testing were done as the tests were not meant to be inferential, but to identify variables that are potentially associated with compliance to split-dose bowel preparation.
Versus ambulatory surgery centers.
Patients responded having talked to no one about laxatives, including doctor, nurse or medical assistant, and pharmacist.
Includes sodium phosphate/OsmoPrep, Half-Lytely, Moviprep, and 2-day preparation.
In addition to liquid laxative preparation.