notes (if applicable):
|Why this is important:- Determining whether LMWH or a VKA should be used for anticoagulation treatment in patients with cancer beyond the initial 6 months of LMWH therapy is critically important. The current recommendation for use of LMWH for the initial 6 months is based on a systematic review that showed LMWH to be advantageous compared with VKA; however, evidence was available only up to 6 months of anticoagulation with VKA. The relative benefits of LMWH or a VKA beyond the initial 6 months are therefore unknown. An RCT is urgently needed to answer this question. The trial should recruit patients with VTE associated with cancer who have completed 6 months of LMWH treatment, in whom long-term treatment is planned, and who have no contraindications to further anticoagulation treatment with either LMWH or a VKA. Patients should be randomised to treatment with either LMWH or a VKA. The primary outcome measure should be VTE recurrence rates. Secondary outcomes should include cost effectiveness and quality of life. Such a trial will provide an evidence-based understanding of the relative benefits and risks of long-term treatment with LMWH versus long-term treatment with a VKA, inform patient and clinician choice and enable development of clear guidelines to minimise variability in care and make the best use of NHS resources.