Abstract

Evidence-based medicine favours randomised controlled trials to limit bias and establish the effects of a treatment with statistical rigour. However, the controlled conditions and careful patient selection of randomised trials may produce results that cannot be generalised to a more diverse patient population in clinical practice. Therefore, there is growing recognition of the importance of supplementing randomised trial data with real-world evidence. Micronised purified flavonoid fraction has been investigated in several large-scale real-world studies, including the RELIEF and DECIDE studies, each of which included more than 1000 patients with chronic venous disease. These studies demonstrated a significant reduction in the prevalence and severity of chronic venous disease symptoms, and an improvement in quality of life. The chronic VEnous dIsorders maNagement and treatment effectivenesS evaluaTion in chronic vEnous disease, an international Program (VEINSTEP) study (NCT04574375), is currently underway in more than 6000 patients with chronic venous disease in nine countries. Preliminary data from one country (Morocco) indicate that chronic venous disease drug treatment, which was micronised purified flavonoid fraction in 75.7% of patients, was associated with a statistically significantly reduction in symptoms and improved quality of life. The overall results are awaited with interest. International chronic venous disease guidelines grade the evidence for micronised purified flavonoid fraction highly, as the benefits of micronised purified flavonoid fraction have been proven in randomised clinical trials and meta-analyses. Real-world studies demonstrate that the randomised evidence for micronised purified flavonoid fraction is generalisable to a clinical practice setting. Treatment decisions in chronic venous disease should consider evidence-based recommendations, including real-world data, as well as patient goals of symptom relief, functional improvement and/or better quality of life.

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