Table 2.
Univariate associations of PI-IBS at baseline questionnaire.
| PI-IBS | Non-PI-IBS | p | |
|---|---|---|---|
| Number | 1004 | 6548 | |
| Age (median (IQR)) | 38 (29–49) | 38 (30–49) | 0.33 |
| HADS Anxiety score (median (IQR)) | 11 (9–13) | 11 (9v13) | 0.40 |
| HADS Depression score (median (IQR)) | 10 (8–11) | 10 (8–11) | 0.06 |
| PHQ12-SS (median (IQR)) | 8 (5–11) | 7 (5–11) | 0.003 |
| History of cholecystectomy | 6.0% | 4.7% | 0.075 |
| History of appendicectomy | 14.1% | 17.2% | 0.016 |
| History of hysterectomy (in women) | 8.2% | 5.2% | 0.002 |
| Characteristics of childhood home | |||
| Contact with animals | 8.37% | 8.15% | 0.813 |
| More than one toilet | 50.8% | 45.9% | 0.004 |
| Running hot water | 89.5% | 90.6% | 0.292 |
| Shared a bed | 13.7% | 12.3% | 0.225 |
| Urban | 67.1% | 63.0% | 0.011 |
| Geographic origin | |||
| Northern Europe and United States | 59.1% | 37.3% | <0.001 |
HADS: Hospital Anxiety and Depression Scale; IQR: interquartile range; PHQ12-SS: Patient Health Questionnaire-12 Somatic Symptom scale score; PI-IBS: post-infectious irritable bowel syndrome.