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Prevalence of influenza vaccination in adults and elderly with chronic respiratory diseases.

The objective was to estimate the prevalence of influenza vaccination in adults and elderly with chronic respiratory diseases (CRDs). The sample included individuals 20 to 59 years of age (n = 23,329) and ≥ 60 years (n = 9,019) that participated in the Brazilian National Survey on Access, Utilization, and Promotion of Rational Use of Medicines (PNAUM) in 2013-2014. We estimated influenza vaccination prevalence rates and respective 95% confidence intervals (95%CI). Associations were verified with the Rao-Scott chi-square test, with significance set at 5%. For all adults and elderly with CRD, prevalence of vaccination was 42.1% (95%CI: 37.2-47.1), with a statistically difference between the two age groups (p < 0.001). The adult population showed significant differences according to marital status (p < 0.05), and the elderly population showed higher vaccination prevalence in the South of Brazil compared to the Northeast (p < 0.05). For the sample as a whole, chronic bronchitis was the most frequently reported disease (43.5%). Considering each specific disease, the percentage of vaccinated adults was low, varying from 25% (other respiratory diseases) to 42% (chronic bronchitis), without a statistically significant difference (p = 0.330). Individuals with respiratory diseases and the elderly in general (≥ 60 years) are priority groups for influenza vaccination; in general, in all the subgroups, prevalence rates were below the target set by the Brazilian Ministry of Health. The recommendation that the vaccine should be applied by a health professional may explain this low adherence to vaccination by the elderly.

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