Impact of Seasonal Migration on Pneumonia and Influenza Hospitalizations in the Elderly
Author Information
Author(s): Chui Kenneth KH, Cohen Steven A, Naumova Elena N
Primary Institution: Tufts University
Hypothesis
How does seasonal migration affect pneumonia and influenza hospitalizations among the elderly in the United States?
Conclusion
The study found distinct seasonal patterns in pneumonia and influenza hospitalizations among elderly individuals, particularly influenced by seasonal migration to states like Florida.
Supporting Evidence
- Over 90% of influenza-associated mortality occurred in the elderly from 1990 to 1998.
- Elderly individuals are among the most mobile population groups due to seasonal migrations.
- Hospitalizations for pneumonia and influenza were significantly higher in winter months for non-residents in states like Florida.
Takeaway
Older people who move to warmer places in the winter get sick with pneumonia and the flu more often, especially in Florida.
Methodology
The study analyzed Medicare hospitalization data for individuals aged 65 and older from 1991 to 2006, comparing hospitalization rates by state of residence and time of year.
Potential Biases
Potential misclassification of non-residents and lack of data on long-term stayers may affect the results.
Limitations
The data only represent severe cases of pneumonia and influenza, likely underestimating the total burden in the elderly population.
Participant Demographics
The study focused on Medicare-eligible individuals aged 65 and older, with a significant portion being white and a notable percentage being male.
Statistical Information
P-Value
< 0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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