Abstract:
OBJECTIVES:Patients with liver disease frequently require hospitalisation with infection often the trigger. Influenza vaccination is an effective infection prevention strategy in healthy and elderly but is often perceived less beneficial in patients with liver disease. We investigated whether influenza vaccination triggered serological response and prevented hospitalisation and death in liver disease. DESIGN:Systematic review and meta-analysis. DATA SOURCES:MEDLINE, EMBASE, PubMed and CENTRAL up to January 2019. ELIGIBILITY CRITERIA:Randomised or observational studies of the effects of influenza vaccine in adults with liver disease. DATA EXTRACTION AND SYNTHESIS:Two reviewers screened studies, extracted data and assessed risk of bias and quality of evidence. Primary outcomes were all-cause hospitalisation and mortality. Secondary outcomes were cause-specific hospitalisation and mortality, and serological vaccine response. Random-effects meta-analysis was used to estimate pooled effects of vaccination. RESULTS:We found 10 041 unique records, 286 were eligible for full-text review and 12 were included. Most patients had viral liver disease. All studies were of very low quality. Liver patients both with and without cirrhosis mounted an antibody response to influenza vaccination, and vaccination was associated with a reduction in risk of hospital admission from 205/1000 to 149/1000 (risk difference -0.06, 95% CI -0.07 to 0.04) in patients with viral liver disease. Vaccinated patients were 27% less likely to be admitted to hospital compared with unvaccinated patients (risk ratio 0.73, 95% CI 0.66 to 0.80). No effect against all-cause or cause-specific mortality or cause-specific hospitalisation was found. CONCLUSIONS:The low quantity and quality of the evidence means that the protective vaccine effect may be uncertain. Considering the high risk of serious health outcomes from influenza infection in patients with liver disease and the safety and low cost of vaccination, overall, the potential benefits of seasonal vaccination both to patients and the healthcare systems are likely to outweigh the costs and risks associated with vaccination. PROSPERO REGISTRATION NUMBER:CRD42017067277.
journal_name
BMJ Openjournal_title
BMJ openauthors
Härmälä S,Parisinos CA,Shallcross L,O'Brien A,Hayward Adoi
10.1136/bmjopen-2019-031070subject
Has Abstractpub_date
2019-09-06 00:00:00pages
e031070issue
9issn
2044-6055pii
bmjopen-2019-031070journal_volume
9pub_type
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