Table 3.
Risk factors for VTE in study and reference groups
| Postpartum VTE group
|
Control group
|
Odds ratio
|
||||
|---|---|---|---|---|---|---|
| (n = 37) | % | (n = 2384) | % | 95% CI | ||
| Maternal characteristics | ||||||
| Maternal age (years) | ||||||
| ≤40 | 36 | 97.3% | 2340 | |||
| >40 | 1 | 2.7% | 26 | 1.1% | 2.5 | (0.3–18.9) |
| Preeclampsia | ||||||
| No | 31 | 83.8% | 2345 | |||
| Yes | 6 | 16.2% | 39 | 1.6% | 11.6 | (4.6–29.5) |
| Cesarean section | ||||||
| No | 22 | 59.5% | 2314 | |||
| Yes | 15 | 40.5% | 233 | 9.8% | 6.8 | (3.4–13.2) |
| Familial thrombosis (first degree relatives <60 years) | ||||||
| No | 31 | 83.8% | 2257 | |||
| Yes | 5 | 13.5% | 127 | 5.3% | 2.9 | (1.1–7.5) |
| missing | 1 | |||||
| Anamnesis of venous thromboembolism | ||||||
| No | 35 | 94.6% | 2376 | |||
| Yes | 2 | 5.4% | 8 | 0.3% | 17.0 | (3.5–83) |
| Body mass index (Kg/m2) | ||||||
| <28 | 26 | 70.3% | 2067 | |||
| ≥28 | 9 | 24.3% | 317 | 13.3% | 2.3 | (1.05–4.8) |
| Missing | 2 | |||||
| Immobilization | ||||||
| No | 26 | 70.3% | na | |||
| Yes | 10 | 27.0% | na | na | ||
| Missing | 1 | |||||
| Abruptio placenta | ||||||
| No | 33 | 89.2% | 2371 | |||
| Yes | 3 | 8.1% | 13 | 0.5% | 16.6 | (4.5–61) |
| Missing | 1 | |||||