| Variable | IBS symptoms | No IBS symptoms | Total |
| Occupation |
|
|
|
| Jobless | 96 | 71 | 167 |
| Employer | 45 | 36 | 81 |
| Self-employed | 94 | 167 | 261 |
| Governmental jobs | 144 | 184 | 328 |
| Students | 21 | 15 | 36 |
| Business | 17 | 24 | 41 |
| Total | 417 | 497 | 914 |
| Working hours |
|
|
|
| <4 hours/day | 40 | 35 | 75 |
| 4 - 6 | 115 | 97 | 212 |
| 6 - 8 | 114 | 239 | 353 |
| 8 - 10 | 32 | 32 | 64 |
| >10 hours | 10 | 11 | 24 |
| Total | 311 | 414 | 728 |