Social deprivation indexes and anti-influenza vaccination coverage in the elderly in Sardinia, Italy, with a focus on the Sassari municipality

The aim of the present study was to evaluate the relationship between social deprivation indexes and anti-influenza vaccination coverage in the elderly population (over 65 years old) in Sardinia. This relationship was first observed in a regional context. An already-known deprivation index was used, and its trivial relationship with anti-influenza vaccination coverage was evaluated. Secondly, the same relationship was assessed in the homogeneous area of the Municipality of Sassari. This required the adoption of an ad hoc deprivation index, which allowed us to stratify the population into deprivation groups and to correlate vaccination coverage with socio-economic variables. The results showed that regional anti-influenza vaccination coverage increased linearly as deprivation decreased. This trend was confirmed in the Municipality of Sassari. Pearson's analysis highlighted factors that significantly correlate with vaccination coverage. In Sardinia, the relationship between anti-influenza vaccination coverage and socio-economic status is consistent with the international panorama, and highlights the necessity to implement interventions to promote vaccination coverage among the elderly.