Estimating the impact of the 2009 influenza A(H1N1) pandemic on mortality in the elderly in Navarre, Spain.
We analysed mortality among people aged 65 years or older in Navarre, Spain in 2009 and compared it with the mean for the same period of time in the previous three years. In the pandemic weeks 24 to 52 2009 we observed 4.9% more deaths than expected (p=0.0268). Excess mortality occurred during the circulation of seasonal influenza (8.0%, p=0.0367) and the first wave of pandemic influenza (9.9%, p=0.0079). In the second wave of pandemic influenza there was a non-significant excess of deaths (5.2%, p=0.1166). Surveillance of laboratory-confirmed severe influenza cases detected only one death in this age group.
Public Health Institute of Navarre and Centro de Investigacion Biomedica en Red de Epidemiologia y Salud Publica, Biomedical Research Network of Epidemiology and Public Health, Pamplona, Spain. jcastilc@navarra.es
J
J
Castilla
J
J
Etxeberria
E
E
Ardanaz
Y
Y
Floristan
R
R
Lopez Escudero
M
M
Guevara
D000368:Aged; D000369:Aged, 80 and over; D004196:Disease Outbreaks; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000302:isolation & purification*; D007251:Influenza, Human / Q000401:mortality*; D009026:Mortality / Q000639:trends; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013030:Spain / Q000453:epidemiology