|
| Frequency | Percentage |
| Previous VTE (except a single event related to major surgery) | 0 | 0 |
| Previous VTE provoked by major surgery | 0 | 0 |
| Known high-risk thrombophilia | 1 | 0.25 |
| Medical comorbidities | 1 | 0.25 |
| Family history of unprovoked or oestrogen-related VTE in first-degree relative | 0 | 0 |
| Known low-risk thrombophilia (no VTE) | 0 | 0 |
| Age (>35 years) | 57 | 14.11 |
| Obesity (BMI > 30) | 43 | 10.64 |
| Obesity (BMI > 40) | 1 | 0.25 |
| Parity ≥ 3 | 57 | 14.11 |
| Smoker | 0 | 0 |
| Pre-eclampsia in current pregnancy | 5 | 1.2 |
| ART/IVF (antenatal only) | 3 | 0.74 |
| Multiple pregnancy | 4 | 0.99 |
| Any surgical procedure in pregnancy or puerperium except immediate repair of the perineum, | 0 | 0 |
| Hyperemesis | 4 | 0.99 |
| Ovarian Hyperstimulation Syndrome (first trimester only) | 2 | 0.50 |
| Current systemic infection | 0 | 0 |
| Immobility | 1 | 0.25 |