Accuracy of heart failure ascertainment using routinely collected healthcare data: a systematic review and meta-analysis.

"Declarations Ethics approval and consent to participateNot applicable. Consent for publicationNot applicable. Competing interestsS.P., M.M., A.O., R.H., M.G., WK, ME, and AEM work in the Clinical Trial Service Unit and Epidemiological Studies Unit of the Nuffield Department of Population Health at the University of Oxford. The Clinical Trial Service Unit and Epidemiological Studies Unit have a staff policy of not taking any personal payments directly or indirectly from industry (with reimbursement sought only for the costs of travel and accommodation to attend scientific meetings). It has received research grants from Abbott, AstraZeneca, Bayer, Boehringer Ingelheim, Eli Lilly, GlaxoSmithKline, The Medicines Company, Merck, Mylan, Novartis, Novo Nordisk, Pfizer, Roche, Schering, and Solvay, which are governed by University of Oxford contracts that protect their independence. Competing interests S.P., M.M., A.O., R.H., M.G., WK, ME, and AEM work in the Clinical Trial Service Unit and Epidemiological Studies Unit of the Nuffield Department of Population Health at the University of Oxford. The Clinical Trial Service Unit and Epidemiological Studies Unit have a staff policy of not taking any personal payments directly or indirectly from industry (with reimbursement sought only for the costs of travel and accommodation to attend scientific meetings). It has received research grants from Abbott, AstraZeneca, Bayer, Boehringer Ingelheim, Eli Lilly, GlaxoSmithKline, The Medicines Company, Merck, Mylan, Novartis, Novo Nordisk, Pfizer, Roche, Schering, and Solvay, which are governed by University of Oxford contracts that protect their independence."

"Funding This study was conducted using Departmental funding from the Clinical Trial Service Unit (CTSU), Nuffield Department of Population Health, University of Oxford. CTSU receives support from the UK Medical Research Council (which funds the MRC Population Health Research Unit in a strategic partnership with the University of Oxford, MC-UU_00017/3, MC-UU_00017/5), the British Heart Foundation, Cancer Research UK and Health Data Research (HDR) UK.”"