HOSPITALIZATIONS AND DEATHS ASSOCIATED WITH INFLUENZA IN BRAZIL: An
estimated incidence in the period 2010 to 2016
Abstract
Objective: To estimate the incidence of influenza-associated
hospitalizations and deaths in Brazil from 2010 to 2016. Method: Records
of hospital discharges and deaths (mortality system) were used by ICD
codes J09-J18, data from laboratory influenza surveillance, and census
population projections adjusted by the percentage of those using public
health services. Meta-analysis was performed to determine the incidences
of hospitalizations and deaths by age group in the five geographic
regions of Brazil. Results: The estimates were 645,661 hospitalizations
and 160,089 deaths from influenza from 2010 to 2016. The highest
incidences of hospitalization occurred in older adults with ≥65 years
(258.6/100.000) and children <5 years old (180.1/100,000),
while deaths stood out among individuals aged ≥65 (142.9/100,000) and
aged 50 to 64 years (22.1/100,000). Regional differences were found,
with higher incidences predominantly in the Midwest, Southeast, and
South regions. Conclusion: The burden of influenza in Brazil is of
concern, with a high number of hospitalizations and deaths from the
disease. Regional and age group differences provide evidence to support
vaccination policy and the improvement of the influenza surveillance
system. Key Words: Human Influenza, Incidence, Mortality,
Hospitalization, Meta-analysis