Relationship between Weather Components in Polluted Days and the Number Of Hospitalization Due to Cardiovascular Diseases

Document Type : Original Article


1 Department of Geography, Najafabad Branch, Islamic Azad University, Najafabad, Iran

2 Department of Planning, Geography Science & Rural Planning Faculty, Isfahan University, Isfahan, Iran


Aims: Air is the combination of atmospheric components or physical conditions
of the current atmosphere in a certain place and a certain time. The aim of this
study was to assess the relationship between weather components, air
atmospheric pollutants and the number of individuals that were hospitalized
due to cardiovascular diseases in polluted days.
Instrument & Methods: In this descriptive study during 2010 to 2013, the
weather parameters in ground and upper levels of Isfahan City, Iran, weather
stations were studied and air quality data were collected from 11 different
points of the city. The number of cardiovascular patient that were hospitalized
was determined by collecting the data of medical record department of 3
hospitals of Isfahan City, Iran; Shahid Chamran, Al-Zahra, and Ali-Asghar. Data
were analyzed by SPSS 19 software using Pearson correlation.
Findings: There were significant correlations between the number of
hospitalizations and minimum temperature (r=0.943; p=0.0001), maximum
temperature (r=0.973; p=0.0001), average temperature (r=-0.069; p=0.013),
rainfall (r=-0.326; p=0.0001), humidity (r=-0.326; p=0.0001), air pressure
(r=0.257; p=0.0001), and wind speed (r=-0.011; p=0.021). There was a
significant difference between the average numbers of hospitalizations due to
cardiovascular diseases according to the range of AQI. Regarding the air
pollutant parameters, the only significant relation was observed for PM10
(p=0.004) and other factors showed no significant relation (p<0.05) to the
numbers of hospitalizations.
Conclusion: The number of hospitalizations due to cardiovascular diseases is
just affected by the PM10 factor of air pollution.