Comparative effectiveness of the different components of care provided in heart failure clinics-protocol for a systematic review and network meta-analysis

Morgan Slater, Joanna Bielecki, Ana Carolina Alba, Lusine Abrahamyan, George Tomlinson, Susanna Mak, Jane MacIver, Shelley Zieroth, Douglas Lee, William Wong, Murray Krahn, Heather Ross, Valeria E Rac, Morgan Slater, Joanna Bielecki, Ana Carolina Alba, Lusine Abrahamyan, George Tomlinson, Susanna Mak, Jane MacIver, Shelley Zieroth, Douglas Lee, William Wong, Murray Krahn, Heather Ross, Valeria E Rac

Abstract

Background: Heart failure (HF) is a complex chronic condition, leading to frequent hospitalization, decreased quality of life, and increased mortality. Current guidelines recommend that multidisciplinary care be provided in specialized HF clinics. A number of studies have demonstrated the effectiveness of these clinics; however, there is a wide range in the services provided across different clinics. This network meta-analysis will aim to identify the aspects of HF clinic care that are associated with the best outcomes: a reduction in mortality, hospitalization, and visits to emergency department (ED) and improvements to quality of life.

Methods: Relevant electronic databases will be systematically searched to identify eligible studies. Controlled trials and observational cohort studies of adult (≥ 18 years of age) patients will be eligible for inclusion if they evaluate at least one component of guideline-based HF clinic care and report all-cause or HF-related mortality, hospitalizations, or ED visits or health-related quality of life assessed after a minimum follow-up of 30 days. Both controlled trials and observational studies will be included to allow us to compare the efficacy of the interventions in an ideal context versus their effectiveness in the real world. Two reviewers will independently perform both title and abstract full-text screenings and data abstraction. Study quality will be assessed through a modified Cochrane risk of bias tool for randomized controlled trials (RCTs) or the ROBINS-I tool for observational studies. The strength of evidence will be assessed using a modified Grades of Recommendation, Assessment, Development, and Evaluation (GRADE) system. Network meta-analysis methods will be applied to synthesize the evidence across included studies. To contrast findings between study designs, data from RCTs will be analyzed separately from non-randomized controlled trials and cohort studies. We will estimate both the probability that a particular component of care is the most effective and treatment effects for specified combinations of care.

Discussion: To our knowledge, this will be the first study to evaluate the comparative effectiveness of the different components of care offered in HF clinics. The findings from this systematic review will provide valuable insight about which components of HF clinic care are associated with improved outcomes, potentially informing clinical guidelines as well as the design of future care interventions in dedicated HF clinics.

Systematic review registration: PROSPERO CRD42017058003.

Keywords: Comparative effectiveness; Heart failure; Network meta-analysis; Systematic review.

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The authors declare that they have no competing interests.

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