Table 1.
Baseline demographic and clinical characteristics, including the prevalence of risk factors for VTE
| Risk factors for VTE | Enoxaparin | Bemiparin | Control | |||
|---|---|---|---|---|---|---|
| n = 2340 | n = 2340 | n = 2340 | ||||
| No. | % | No. | % | No. | % | |
| -History of APS | 0 | 0 | 2 | 0.1 | 0 | 0 |
| -Varicose veins | 33 | 1.4 | 31 | 1.3 | 31 | 1.3 |
| -Heart disease | 5 | 0.2 | 7 | 0.3 | 7 | 0.3 |
| -Surgery during pregnancy | 32 | 1.4 | 26 | 1.1 | 26 | 1.1 |
| -Dehydration | 10 | 0.4 | 18 | 0.8 | 2 | 0.1 |
| -Severe inflammation | 15 | 0.6 | 16 | 0.7 | 0 | 0 |
| -Pre-eclampsia | 147 | 6.3 | 123 | 5.3 | 125 | 5.3 |
| -Prolonged labour | 173 | 7.4 | 148 | 6.3 | 174 | 7.4 |
| -Smoking | 42 | 1.8 | 31 | 1.3 | 36 | 1.5 |
| -Twin pregnancy | 70 | 3.0 | 54 | 2.3 | 57 | 2.4 |
| -Postpartum haemorrhage | 23 | 1.0 | 24 | 1.0 | 22 | 0.9 |
| -Bed rest >3 days | 4 | 0.2 | 24 | 1.0 | 4 | 0.2 |
| -Wound infection | 7 | 0.3 | 22 | 0.9 | 7 | 0.3 |
| -Pyelonephritis | 8 | 0.3 | 37 | 1.6 | 28 | 1.2 |
| -BMI > 30 kg/m2 | 1222 | 52.2 | 1335 | 57.1 | 1197 | 51.2 |
| -Age > 35 years | 852 | 36.4 | 938 | 40.1 | 864 | 36.9 |
| -Para ≥ 4 | 1201 | 51.3 | 1133 | 48.4 | 1156 | 49.4 |
VTE:venous thromboembolic event; APS: antiphospholipid antibody syndrome; BMI: body mass index.