Table 1. Selected characteristics of the Keelung population w/o irritable bowel syndrome.
| Characteristics | Total (N=39 384) | Irritable bowel syndrome (N=9160) | Non-irritable bowel syndrome (N=30 224) | P-value |
|---|---|---|---|---|
| Mean age±s.d. | 55.9±11.6 | 60.9±12.2 | 54.4±11.1 | <0.0001 |
|
Age at entry | ||||
| 40–49 | 14 624 | 2155 (14.7%) | 12 469 (85.3%) | <0.0001 |
| 50–59 | 9945 | 2026 (20.4%) | 7919 (79.6%) | |
| 60–69 | 8746 | 2328 (26.6%) | 6418 (73.4%) | |
| 70+ | 6069 | 2651 (43.7%) | 3418 (56.3%) | |
|
Gender | ||||
| Female | 23 847 | 5648 (23.7%) | 18 199 (76.3%) | 0.013 |
| Male | 15 537 | 3512 (22.6%) | 12 025 (77.4%) | |
|
Education level | ||||
| Low | 19 352 | 5504 (28.4%) | 13 848 (71.6%) | <0.0001 |
| Medium | 15 208 | 2855 (18.8%) | 12 353 (81.2%) | |
| High | 4571 | 749 (16.4%) | 3811 (83.6%) | |
| Body mass index (BMI)±s.d. | 24.9±3.7 | 24.9±3.7 | 24.9±3.6 | 0.8031 |
|
Diabetes | ||||
| Yes | 3153 | 939 (29.8%) | 2214 (70.2%) | <0.0001 |
| No | 35 988 | 8150 (22.6%) | 27 848 (77.4%) | |
|
Hypertension | ||||
| Yes | 13 705 | 3371 (24.6%) | 10 334 (75.4%) | <0.0001 |
| No | 25 487 | 5742 (22.5%) | 19 745 (77.5%) | |
|
CRC family history | ||||
| Yes | 877 | 181 (20.6%) | 696 (79.4%) | 0.0633 |
| No | 38 507 | 8979 (23.3%) | 29 528 (76.7%) | |
|
Smoking | ||||
| Current or former | 10 118 | 2229 (22%) | 7889 (78%) | 0.0003 |
| No | 28 816 | 6863 (23.8%) | 21 953 (76.2%) | |
|
Drinking | ||||
| Current or former | 8912 | 1784 (20%) | 7100 (80%) | <0.0001 |
| No | 29 833 | 7281 (24.4%) | 22 466 (75.6%) | |
|
Exercise frequency | ||||
| Never | 11 102 | 2458 (22.1%) | 8644 (77.9%) | <0.0001 |
| Low | 17 297 | 3820 (22.1%) | 13 477 (77.9%) | |
| High | 10 207 | 2752 (27%) | 7455 (73%) | |
| Colorectal Neoplasia | 1073 | 343 | 730 | |
| CRC | 310 | 107 | 203 | |
| Follow-up time | 7.78 | 7.92 | 7.73 | |