Abstract:
INTRODUCTION:Atrial fibrillation (AF) is one of the leading causes of cerebrovascular mortality and morbidity. Oral anticoagulants (OACs) have been shown to reduce the incidence of cardioembolic stroke in patients with AF, adherence to treatment being an essential element for their effectiveness. Since the release of the first non-vitamin K antagonist oral anticoagulant, several observational studies have been carried out to estimate OAC adherence in the real world using pharmacy claim databases or AF registers. This systematic review aims to describe secondary adherence to OACs, to compare adherence between OACs and to analyse potential biases in OAC secondary adherence studies using databases. METHODS AND ANALYSIS:We searched on PubMed, SCOPUS and Web of Science databases (completed in 26 September 2018) to identify longitudinal observational studies reporting days' supply adherence measures with OAC in patients with AF from refill databases or AF registers. The main study endpoint will be the percentage of patients exceeding the 80% threshold in proportion of days covered or the medication possession ratio. Two reviewers will independently screen potential studies and will extract data in a structured format. A random-effects meta-analysis will be carried out to pool study estimates. The risk of bias will be assessed using the Newcastle-Ottawa Scale for observational studies and we will also assess some study characteristics that could affect days' supply adherence estimates. ETHICS AND DISSEMINATION:This systematic review using published aggregated data does not require ethics approval according to Spanish law and international regulations. The final results will be published in a peer-review journal and different social stakeholders, non-academic audiences and patients will be incorporated into the diffusion activities. PROSPERO REGISTRATION NUMBER:CRD42018095646.
journal_name
BMJ Openjournal_title
BMJ openauthors
Rodríguez-Bernal CL,García-Sempere A,Hurtado I,Santa-Ana Y,Peiró S,Sanfélix-Gimeno Gdoi
10.1136/bmjopen-2018-025102subject
Has Abstractpub_date
2018-12-19 00:00:00pages
e025102issue
12issn
2044-6055pii
bmjopen-2018-025102journal_volume
8pub_type
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