Table 1.
Demographic and clinical features of the study population, n (%)
|
Characteristics
|
High volume (n = 871)
|
Low volume (n = 944)
|
P
value1
|
| Age | 61.2 ± 14.3 | 60.1 ± 14.6 | 0.092 |
| Male sex | 463 (53.2) | 448 (47.5) | 0.0153 |
| Split-dose | 389 (44.7) | 361 (38.2) | 0.0063 |
| High-definition colonoscope | 296 (33.9) | 310 (32.8) | 0.605 |
| Indication | |||
| Symptoms | 538 (61.8) | 563 (59.6) | |
| Surveillance | < 0.0013 | ||
| Post polypectomy | 134 (15.4) | 154 (16.3) | |
| Post colonic resection for CRC | 73 (8.4) | 73 (7.7) | |
| Positive FBT | 94 (10.8) | 57 (6.1) | |
| IBD | 32 (3.6) | 97 (10.3) | |
| BMI, mean ± SD2 | 25.5 ± 4.3 | 25.0 ± 4.0 | 0.0153 |
| Previous abdominal surgery | 98 (11.3) | 96 (10.2) | 0.456 |
| Constipation | 66 (7.6) | 86 (9.1) | 0.239 |
| Comorbidities | |||
| Heart disease | 90 (10.3) | 65 (6.9) | 0.0093 |
| Diabetes | 72 (8.3) | 65 (6.9) | 0.266 |
| Stroke/dementia | 19 (2.2) | 25 (2.6) | 0.518 |
| Severe CKD | 21 (2.4) | 15 (1.6) | 0.209 |
| Cirrhosis | 12 (1.4) | 13 (1.4) | 0.999 |
| GERD | 192 (22.0) | 219 (23.2) | 0.557 |
| Waiting time > 1 mo | 485 (55.7) | 570 (60.4) | 0.0903 |
| Non-adherence to low fiber diet | 91 (10.5) | 112 (11.9) | 0.329 |
| Lives alone2 | 123 (14.8) | 149 (16.3) | 0.395 |
| Low instruction2 | 157 (19.6) | 122 (14.1) | 0.0023 |
1
P value degrees of freedom = 1, except for age (1814), indication (4) and body mass index (BMI) (1726).
2
BMI available for 1727 patients; information about living alone available for 1747 patients; instruction level available for 1662 patients.
3
Significant different.
CRC: Colorectal cancer; FBT: Fecal blood test; IBD: Inflammatory bowel disease; BMI: Body mass index; CKD: Chronic kidney disease; GERD: Gastroesophageal reflux disease.