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Association of Normal Weather Periods and El Ni?o Events With Hospitalization for Viral Pneumonia in Females: California, 1983?1998

T

tyto

Well-known member
SOURCE: PubMed Central
Free Full-text article.
http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=11499104

Objectives.
This study examined associations between weather and hospitalizations of females for viral pneumonia during normal weather periods and El Ni?o events in the California counties of Sacramento and Yolo, San Francisco and San Mateo, and Los Angeles and Orange.

Methods.
Associations between weather and hospitalizations (lagged 7 days) for January 1983 through June 1998 were evaluated with Poisson regression models. Generalized estimating equations were used to adjust for autocorrelation and overdispersion. Data were summed over 4 days.

Results.
Associations varied by region. Hospitalizations in San Francisco and Los Angeles increased significantly (30%?50%) with a 5?F decrease in minimum temperature. Hospitalizations in Sacramento increased significantly (25%?40%) with a 5?F decrease in maximum temperature difference. The associations were independent of season. El Ni?o events were associated with hospitalizations only in Sacramento, with significant decreases for girls and increases for women.

Conclusions.
The results suggest that viral pneumonia could continue to be a major public health issue, with a significant association between weather and hospitalizations, even as the global mean temperature continues to rise. An understanding of population sensitivity under different weather conditions could lead to an improved understanding of virus transmission.
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Some links of past Flutrackers.com entries on El Nino and health.

Lancet 2003 Review
El Ni?o and health
http://www.flutrackers.com/forum/showthread.php?t=14817

Risk of El Nino Rising, Australian Forecaster Says (Update2)
http://www.flutrackers.com/forum/showthread.php?p=242369

Outbreak of the El Nino Maybe a Precursor to Influenza Pandemic
http://www.flutrackers.com/forum/showthread.php?t=91678
 
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