Comparison of self-report influenza vaccination coverage with data from a population based computerized vaccination registry and factors associated with discordance

Highlights • Self-report and computerized registries are valid methods to assess flu vaccination. • Self-report influenza vaccination overestimates vaccination registries coverages. • Self-report validity is affected by socio-demographic variables. • Highest concordance is found among the target population for influenza vaccine. • Strategies must be implemented to improve both coverage estimation methods.