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Aims: Evidence supporting yearly influenza vaccination in patients with chronic heart failure (HF) is limited, consequently leading to inconsistent guideline recommendations. We aimed to investigate the impact of influenza vaccination on the risk of hospitalization in HF patients. Methods and results: We used linked primary and secondary health records in England between 1990 and 2013. Using a self-controlled case series design with conditional Poisson regression, we estimated the incidence rate ratio (IRR, 95% CI) of the number of hospitalizations in a year following vaccination with an adjacent vaccination-free year in the same individuals. We found the uptake of vaccination to be varied and generally low (49% in 2013). Among 59,202 HF patients, influenza vaccination was associated with a lower risk of hospitalization due to cardiovascular disease (0.73 [0.71, 0.76]), with more modest effects for hospitalization due to respiratory infections (0.83 [0.77, 0.90]), and all-cause hospitalizations (0.96 [0.95, 0.98]). The relative effects were somewhat greater in younger patients but with no material difference between men and women. In validation analyses, effects were not significant for consecutive years without vaccination (0.96 [0.92, 1.00]) or hospitalization due to cancer (1.02 [0.84, 1.22]). Conclusion: In HF patients, influenza vaccination is associated with reduced risk of hospitalizations, especially for cardiovascular disease. Improved efforts for wider uptake of vaccination among HF patients are needed.

Original publication

DOI

10.1093/eurheartj/ehw411

Type

Journal article

Journal

Eur Heart J

Publication Date

01/02/2017

Volume

38

Pages

326 - 333

Keywords

Heart failure, Hospitalization, Influenza vaccination, Adult, Aged, Aged, 80 and over, Cardiovascular Diseases, Case-Control Studies, Chronic Disease, Female, Heart Failure, Hospitalization, Humans, Influenza Vaccines, Influenza, Human, Male, Middle Aged, Respiratory Tract Infections, Risk Factors, Vaccination