Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh

The acute effect of temperature on asthma morbidity in Bangladesh is not well understood. As climate varies extensively in different parts of the world, the relation between temperature and asthma might also differ. We investigated the association between temperature and asthma-related hospital visi...

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Autores principales: Kabir, Ayesha Ferdosi, Ng, Chris Fook Sheng, Yasumoto, Shinya, Hayashi, Taiichi, Watanabe, Chiho
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7908622/
https://www.ncbi.nlm.nih.gov/pubmed/33498592
http://dx.doi.org/10.3390/ijerph18030890
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author Kabir, Ayesha Ferdosi
Ng, Chris Fook Sheng
Yasumoto, Shinya
Hayashi, Taiichi
Watanabe, Chiho
author_facet Kabir, Ayesha Ferdosi
Ng, Chris Fook Sheng
Yasumoto, Shinya
Hayashi, Taiichi
Watanabe, Chiho
author_sort Kabir, Ayesha Ferdosi
collection PubMed
description The acute effect of temperature on asthma morbidity in Bangladesh is not well understood. As climate varies extensively in different parts of the world, the relation between temperature and asthma might also differ. We investigated the association between temperature and asthma-related hospital visits in the tropical city of Dhaka. We analyzed information from a total of 5989 asthma patients who received ambulatory care in the form of nebulized medication at the National Asthma Center in Mohakhali, Dhaka from February to November 2013. A time-stratified case-crossover study was conducted to estimate the effect of daily temperature, with consideration of delayed effects and possible confounders such as relative humidity and political strikes. An inverse association was observed between temperature and the number of hospital visits. The effect was delayed for approximately a week. A degree centigrade decrease in mean temperature (averaged across lags 0-6) was associated with an increase of approximately 4.5% (95% CI 1.5, 7.5) in all asthma visits. The association was evident in adult males but marginal in elderly males. A positive association (lag 0) was observed among adult females, whereas no association was observed among children. Strikes significantly modified the effect among the elderly. Findings suggest temperature declines affect asthma outcomes in a warm climate, and this effect can be delayed and vary by sex and age group.
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spelling pubmed-79086222021-02-27 Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh Kabir, Ayesha Ferdosi Ng, Chris Fook Sheng Yasumoto, Shinya Hayashi, Taiichi Watanabe, Chiho Int J Environ Res Public Health Article The acute effect of temperature on asthma morbidity in Bangladesh is not well understood. As climate varies extensively in different parts of the world, the relation between temperature and asthma might also differ. We investigated the association between temperature and asthma-related hospital visits in the tropical city of Dhaka. We analyzed information from a total of 5989 asthma patients who received ambulatory care in the form of nebulized medication at the National Asthma Center in Mohakhali, Dhaka from February to November 2013. A time-stratified case-crossover study was conducted to estimate the effect of daily temperature, with consideration of delayed effects and possible confounders such as relative humidity and political strikes. An inverse association was observed between temperature and the number of hospital visits. The effect was delayed for approximately a week. A degree centigrade decrease in mean temperature (averaged across lags 0-6) was associated with an increase of approximately 4.5% (95% CI 1.5, 7.5) in all asthma visits. The association was evident in adult males but marginal in elderly males. A positive association (lag 0) was observed among adult females, whereas no association was observed among children. Strikes significantly modified the effect among the elderly. Findings suggest temperature declines affect asthma outcomes in a warm climate, and this effect can be delayed and vary by sex and age group. MDPI 2021-01-20 2021-02 /pmc/articles/PMC7908622/ /pubmed/33498592 http://dx.doi.org/10.3390/ijerph18030890 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kabir, Ayesha Ferdosi
Ng, Chris Fook Sheng
Yasumoto, Shinya
Hayashi, Taiichi
Watanabe, Chiho
Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh
title Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh
title_full Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh
title_fullStr Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh
title_full_unstemmed Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh
title_short Effect of Ambient Temperature on Daily Nebulized Asthma Hospital Visits in a Tropical City of Dhaka, Bangladesh
title_sort effect of ambient temperature on daily nebulized asthma hospital visits in a tropical city of dhaka, bangladesh
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7908622/
https://www.ncbi.nlm.nih.gov/pubmed/33498592
http://dx.doi.org/10.3390/ijerph18030890
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