Document Detail


Seasonality of mortality in Sri Lanka: biometeorological considerations.
MedLine Citation:
PMID:  8984066     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The seasonal variation of mortality in Sri Lanka was studied in relation to meteorological variables. Time series data of the total monthly number of deaths in men and women from 1976 to 1980 were analyzed by power spectrum analysis of the fast Fourier transformation method in the areas of Colombo (lowland area, altitude 7 m) and Nuwara-Eliya (highland area, altitude 1890 m), respectively. In the Colombo area, where the mean temperature was always high (mean, 27.5 degrees C), a seasonal variation in mortality of 6 months was validated by power spectrum analysis with peak times in June and November. These mortality peaks corresponded to those of the amounts of rainfall which also showed an identical predominant period of 6 months. In the Nuwara Eliya area, where the mean temperature was always low at about 15-16 degrees C, a seasonal variation of approximately 3 months was found in addition to the 6 months' periodicity. The comparison of the power spectrum pattern of mortality with those of meteorological variables suggested that the amount of rainfall was associated with the seasonal variation of mortality in the Nuwara-Eliya area. In conclusion, the seasonality of mortality in Sri Lanka, a typical tropical zone country, was related to seasonal variation in the amount of rainfall, or a humidity factor, but not to mean temperature.
Authors:
Y Motohashi; T Takano; K Nakamura; K Nakata; M Tanaka
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of biometeorology     Volume:  39     ISSN:  0020-7128     ISO Abbreviation:  Int J Biometeorol     Publication Date:  1996 Sep 
Date Detail:
Created Date:  1997-01-08     Completed Date:  1997-01-08     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0374716     Medline TA:  Int J Biometeorol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  121-6     Citation Subset:  IM    
Affiliation:
Department of Hygiene and Preventive Medicine, Fukushima Medical College, Fukushima City, Japan.
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MeSH Terms
Descriptor/Qualifier:
Female
Fourier Analysis
Humans
Male
Meteorological Concepts*
Mortality*
Rain
Seasons
Sri Lanka / epidemiology

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