Cost-Effectiveness Analysis of Routine Venous Doppler Ultrasound for Diagnosis of Deep Venous Thrombosis at Admission to Inpatient Rehabilitation

Objective The aims of the study were to identify whether timing of venous thromboembolism diagnosis is associated with differences in patient outcomes and to perform a cost-effectiveness analysis of routine venous Doppler ultrasound at admission to inpatient rehabilitation, taking into account costs associated with prolonged inpatient rehabilitation length of stay, and development of pulmonary embolism. Design This was a retrospective cohort study of 2312 consecutive patient discharges from a single inpatient rehabilitation facility for an 18-mo period. Cost-effectiveness model was built using TreeAge Healthcare Pro. The base case was constructed using probabilities and inpatient rehabilitation length of stay identified from retrospective analysis. Cost of Doppler ultrasound was obtained through the literature, and daily inpatient rehabilitation cost was obtained from the study institution. Results Venous thromboembolism was diagnosed in 6.6% of patients. Asymptomatic patients diagnosed with venous thromboembolism on screening Doppler ultrasound had shorter inpatient rehabilitation length of stay (P = 0.045) and lower rate of pulmonary embolism (P

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