07 July 2021 : Clinical Research
Application of the RCOG Risk Assessment Model for Evaluating Postpartum Venous Thromboembolism in Chinese Women: A Case-Control Study
Ying-Zhou Ge123ACDEF, Chen Zhang123CD, Yan-Qing Cai123ABE, He-Feng Huang123AEG*DOI: 10.12659/MSM.929904
Med Sci Monit 2021; 27:e929904
Supplementary Table 1 The RCOG risk assessment model for VTE.
| Risk factors for VTE | Score* |
|---|---|
| Previous VTE (except a single event related to major surgery) | 4 |
| Previous VTE provoked by major surgery | 3 |
| Known high-risk thrombophilia | 3 |
| Medical comorbidities (e.g. cancer, heart failure; active systemic lupus erythematosus, Inflammatory polyarthropathy or inflammatory bowel disease; nephrotic syndrome; type I diabetes mellitus with nephropathy; sickle cell disease; current intravenous drug user) | 3 |
| Family history of unprovoked or estrogen-related VTE in first-degree relative | 1 |
| Known low-risk thrombophilia (no VTE) | 1 |
| Age (>35 years) | 1 |
| Obesity | |
| BMI ≥30 | 1 |
| BMI ≥40 | 2 |
| Parity ≥3 | 1 |
| Smoker | 1 |
| Gross varicose veins | 1 |
| Pre-eclampsia in current pregnancy | 1 |
| ART/IVF (antenatal only)** | 1 |
| Multiple pregnancy | 1 |
| Cesarean section in labor | 2 |
| Elective cesarean section | 1 |
| Mid-cavity or rotational operative delivery | 1 |
| Prolonged labor (>24 hours) | 1 |
| PPH (>1 litre or transfusion) | 1 |
| Preterm birth | 1 |
| Stillbirth in current pregnancy | 1 |
| Transient risk factors | |
| Any surgical procedure in pregnancy or puerperium except immediate repair of the perineum, e.g. appendicectomy, postpartum sterilisation | 3 |
| Hyperemesis | 3 |
| OHSS (first trimester only)** | 4 |
| Current systemic infection | 1 |
| Immobility, dehydration | 1 |
| VTE – venous thromboembolism; BMI – body mass index; ART – assisted reproductive technology; IVF – in vitro fertilization; PPH – postpartum hemorrhage. * Risk factors with score ≥4 are considered as high-risk factor; risk factors with score of 2–3 are considered as intermediate-risk factors; risk factors with score of 1 are considered as low-risk factors. ** ART/IVF is regarded as a risk factor for antenatal VTE, and ovarian hyperstimulation syndrome (OHSS) is regarded as a risk factor for VTE only in the first trimester. | |