Characteristics of the Wells Score and Associated Factors of Pulmonary Embolisms in Inpatients with Deep Venous Thrombosis


  • Sarayuth Boonchai Division of Urology, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
  • Osaree Akaraborworn Division of Trauma and Critical Care, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.



deep vein thrombosis, pulmonary embolism, venous thromboembolism


Objective: To evaluate the characteristics of the Wells score and associated factors of acute pulmonary embolisms (PE) in surgical-based inpatients’ with acute deep venous thrombosis (DVT), at Songklanagarind Hospital.

Material and Methods: Acute DVT inpatients in the departments of surgery, obstetrics-gynecology and orthopedics; from 2010 to 2016, were extracted from medical records, and retrospectively reviewed. The Wells score was calculated for risk stratification in terms of low, moderate, and high probability. Finally, the associated factors of acute PE were assessed.

Results: There were 278 inpatients diagnosed with acute DVT in the surgery (n=142), obstetrics-gynecology (n=101, and orthopedics (n=35) wards. The numbers of low, moderate and high risk probability were 4 (1.0%), 141 (51.0%) and 133 (48.0%), respectively. We identified four factors that were significantly different between the three specialties comprising of: “paralysis, paresis, or recent plaster immobilization of the lower extremities”, “recently bedridden or underwent a major surgical procedure”, “leg edema” and “active cancer”. Regarding the surgery service, patients with acute PE experienced a higher rate of bilateral DVT than those who did not—28.0% and 8.0%, respectively.

Conclusion: The low-risk probability determined by Wells score had low incidence of acute DVT in in-patient department settings. Acute bilateral DVT was more significantly associated with acute PE in the surgery service.


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How to Cite

Boonchai S, Akaraborworn O. Characteristics of the Wells Score and Associated Factors of Pulmonary Embolisms in Inpatients with Deep Venous Thrombosis. J Health Sci Med Res [Internet]. 2022 Jul. 22 [cited 2023 Jan. 28];40(4):411-8. Available from:



Original Article