A systematic review of the evidence of outdoor air pollution on asthma hospital visits in children and adolescents in South Asia - a call for data

Journal article


Malamardi, Sowmya, Lambert, Katrina A., Batra, Mehak, Tham, Rachel, Padukudru Anand, Mahesh and Erbas, Bircan. (2021). A systematic review of the evidence of outdoor air pollution on asthma hospital visits in children and adolescents in South Asia - a call for data. Wellcome Open Research. 16, p. Article: 174. https://doi.org/10.12688/wellcomeopenres.16991.1
AuthorsMalamardi, Sowmya, Lambert, Katrina A., Batra, Mehak, Tham, Rachel, Padukudru Anand, Mahesh and Erbas, Bircan
Abstract

Background: Outdoor air pollution and childhood asthma are increasing problems in South Asian countries. However, little is known about the associations between levels of air pollution and severe childhood asthma requiring hospital treatment in these regions.
Methods: We undertook a systematic review to assess the evidence between outdoor air pollution exposure and childhood and adolescent asthma hospitalization in South Asia. MEDLINE, Web of Science, Google Scholar, CINAHL, Embase, Scopus, ProQuest Central databases were searched for peer-reviewed papers, and examination of reference lists was conducted for additional studies. We identified all the literature published in English up to January 2021 for the study population comprised of children aged less than 19 years. The search strategy was designed to identify all the studies and screen them as per the inclusion criteria. The method of qualitative synthesis using the standard tool determined the comprehensiveness of the assessment of bias.
Results: Of the original 367 studies screened three studies were ultimately included from India, Pakistan and Sri Lanka and a narrative synthesis was conducted. Although studies reported adverse effects of outdoor pollution on asthma hospitalizations, limitations in exposure assessments, varying definitions of asthma hospitalizations and limited data analysis were identified.
Conclusions: There is currently limited evidence that can provide meaningful risk estimates of the impact of outdoor air pollution on asthma hospitalizations during childhood and adolescence. Studies with comparable outcome definitions, appropriate exposure assessments and study designs are needed to inform future public and environmental health policy.
PROSPERO registration: CRD42020156714 (28/04/2020)

Keywordsasthma; air pollution; South Asia; hospitalization
Year2021
JournalWellcome Open Research
Journal citation16, p. Article: 174
PublisherWellcome Trust
ISSN2398-502X
Digital Object Identifier (DOI)https://doi.org/10.12688/wellcomeopenres.16991.1
Open accessPublished as ‘gold’ (paid) open access
Research or scholarlyResearch
Page range1-10
Publisher's version
License
File Access Level
Open
Output statusPublished
Publication dates
Online06 Jul 2021
Publication process dates
Deposited13 Oct 2021
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