Table 2.
The comparison between cases with and without improvement of bowel preparation.
| Improved BP | Non-improved BP | p value | |
|---|---|---|---|
| Case number | 77 (72.6) | 29 (27.4) | |
| Gender, n (%), male : female | 40 : 37 (51.9 : 48.1) | 16 : 13 (55.2 : 44.8) | 0.77 |
| Age, mean ± SD | 68.7 ± 9.8 | 71.6 ± 8.6 | 0.08 |
| Age, n (%), ≤74 : ≥75 years old | 50 : 27 (64.9 : 35.1) | 18 : 11 (62.1 : 37.9) | 0.94 |
| Body mass index, mean ± SD | 23.2 ± 3.8 | 23.6 ± 4.2 | 0.36 |
| Performance status (0 : 1 + 2), n (%) | 71 : 6 (92.2 : 7.8) | 21 : 8 (72.4 : 27.6) | 0.01 |
| Laxative combination, n (%) Irritant laxative, n (%) |
25 (32.5) 14 (18.2) |
10 (44.4) 9 (29.6) |
0.84 0.15 |
| Dose of PEG/day (13.7 g : 27.4 g), n (%) | 68 : 9 (88.3 : 11.7) | 26 : 3 (89.7 : 10.3) | 0.88 |
| Colonoscopy | |||
| Cecal intubation, n (%) | 77 (100) | 29 (100) | 1.0 |
| Insertion time (min), mean ± SD | 8.3 ± 6.4 | 9.2 ± 7.5 | 0.03 |
| Pain score∗, mean ± SD | 0.4 ± 0.8 | 0.6 ± 0.9 | 0.02 |
| Underlying disease | |||
| Hyperlipidemia, n (%) | 23 (29.9) | 9 (31.0) | 0.90 |
| Colorectal surgery, n (%) | 14 (18.2) | 2 (6.9) | 0.25 |
| Diabetes | 10 (13.0) | 3 (10.3) | 0.97 |
| Hypothyroidism | 4 (5.2) | 1 (3.4) | 0.89 |
| Hepatic or biliary disorder | 4 (5.2) | 0 (0.0) | 0.49 |
| Parkinson's disease | 0 (0.0) | 1 (3.4) | 0.60 |
| Concomitant medication | |||
| Antacids, n (%) | 20 (26.0) | 8 (27.6) | 0.86 |
| Calcium antagonists, n (%) | 21 (27.3) | 7 (24.1) | 0.74 |
| Antidepressants, n (%) | 8 (10.4) | 6 (20.7) | 0.28 |
BP: bowel preparation; SD: standard deviation; PEG+E: polyethylene glycol plus electrolytes; pain score (0: no pain, 1: minimum pain, 2: moderate pain, and 3: severe pain).