Table 1.
Baseline characteristics of the Japanese population n (%)
| Variables | Total (n = 11812) |
Cecal intubation |
|
| Incomplete (n = 590) | Complete (n = 11222) | ||
| Age (mean ± SD) | 57.8 ± 14.8 | 60.8 ± 15.6 | 57.6 ± 14.7 |
| Age ≥ 60 yr | 6174 (52.3) | 358 (60.7) | 5816 (51.8) |
| Sex (female) | 4126 (34.9) | 248 (42.2) | 3878 (34.6) |
| Poor bowel cleansing | 593 (5.0) | 107 (18.1) | 486 (4.3) |
| History of abdominal or pelvic surgery | 2417 (20.5) | 175 (29.7) | 2242 (20.0) |
| Melanosis coli | 438 (3.7) | 25 (4.2) | 413 (3.7) |
| Inflammatory bowel disease | 1199 (10.2) | 70 (11.9) | 1129 (10.1) |