title: Do the quality of the trials and the year of publication affect the efficacy of intervention to improve seasonal influenza vaccination among healthcare workers?: Results of a systematic review.
abstract: BACKGROUND
  Despite longstanding recommendations by public-health authorities vaccination coverage in health care workers worldwide are poor. The aim of this study is to conduct a systematic review of the trials conducted to increase seasonal influenza vaccination rates among health care workers.
  
  
  RESULTS
  Ten articles met the pre-determined criteria. For all article the score calculation was performed.
  
  
  CONCLUSIONS
  The combination of an educational and a promotional element appared the most effective in augmenting the influenza vaccination coverage among health care workers. But some cases, the intervention did not contribute to increasing the vaccination rates among health care workers. In any case, the quality of controlled trials plays an important role in the results obtained by carrying out a specific intervention and contributed to obtaining this debatable results.
  
  
  METHODS
  Research was conducted using Scopus and PubMed database. We selected all clinical trials to perform the meta-analyses.
authors.affiliation: Department of Public Health and Infectious Diseases; Sapienza University of Rome; Rome, Italy; 2 University of Amsterdam; Amsterdam, the Netherlands.
authors.forename: Silvia
authors.initials: S
authors.lastname: Schmidt
authors.forename: Rosella
authors.initials: R
authors.lastname: Saulle
authors.forename: Domitilla
authors.initials: D
authors.lastname: Di Thiene
authors.forename: Antonio
authors.initials: A
authors.lastname: Boccia
authors.forename: Giuseppe
authors.initials: G
authors.lastname: La Torre
mesh_terms: D001521:Behavior Therapy / Q000379:methods; D004501:Education, Medical; D019983:Guideline Adherence; D006282:Health Personnel; D006293:Health Promotion; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control*; D014611:Vaccination / Q000706:statistics & numerical data*
chemical_list: D007252:Influenza Vaccines
keywords: clinical trials; health care workers; influenza; systematic review; vaccination