Association of inflammatory bowel disease (IBD) and venous thromboembolism (VTE) by age (cohort study)
| Event | HRs (95% CI) | |||
| Age 0–20 | Age 21–40 | Age 41–60 | Age ≥60 | |
| VTE | 6.6 (3.3 to 13.2) | 2.8 (2.4 to 3.4) | 2.3 (2.0 to 2.6) | 1.6 (1.5 to 1.8) |
| Unprovoked VTE* | 4.5 (1.7 to 12.0) | 2.3 (1.9 to 2.9) | 1.8 (1.5 to 2.1) | 1.4 (1.2 to 1.6) |
| DVT | 6.0 (2.5 to 14.7) | 2.3 (1.9 to 2.9) | 2.1 (1.8 to 2.4) | 1.6 (1.4 to 1.8) |
| Unprovoked DVT* | 3.4 (0.9 to 12.7) | 1.9 (1.4 to 2.5) | 1.7 (1.4 to 2.0) | 1.3 (1.1 to 1.6) |
| PE | 6.4 (2.0 to 20.3) | 4.1 (3.2 to 5.4) | 2.9 (2.4 to 3.5) | 1.7 (1.5 to 1.9) |
| Unprovoked PE* | 4.5 (0.8 to 24.6) | 3.4 (2.4 to 4.8) | 2.0 (1.5 to 2.7) | 1.5 (1.2 to 1.8) |
↵* Unprovoked events are events occurring in the absence of malignancy (ever) or recent surgery, fracture or pregnancy (within 90 days of event).