Risk Factors of Asthma in the Asian Population: a Systematic Review and Meta-analysis

Overview

Journal J Physiol Anthropol

Publisher Biomed Central

Specialty Social Sciences

Date 2021 Dec 10

PMID 34886907

Citations 14

Authors

Yang Yie Sio

Fook Tim Chew

Affiliations

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Abstract

Background And Objective: An increasing trend of asthma prevalence was observed in Asia; however, contributions of environmental and host-related risk factors to the development of this disease remain uncertain. This study aimed to perform a systematic review and meta-analysis for asthma-associated risk factors reported in Asia.

Methods: We systematically searched three public databases (Web of Science, PubMed, and Scopus) in Feb 2021. We only included articles that reported environmental and host-related risk factors associated with asthma in the Asian population. Random-effect meta-analyses were conducted for frequently reported asthma-associated risk factors to provide an overall risk estimate of asthma development.

Results: Of 4030 records obtained from public databases, 289 articles were selected for review. The most frequently reported asthma-associated risk factor was the family history of allergy-related conditions. The random-effect asthma risk estimates (pooled odds ratio, OR) were 4.66 (95% confidence interval (CI): 3.73-5.82) for the family history of asthma, 3.50 (95% CI: 2.62-4.67) for the family history of atopy, 3.57 (95% CI: 3.03-4.22) for the family history of any allergic diseases, 1.96 (95% CI: 1.47-2.61) for the family history of allergic rhinitis, and 2.75 (95% CI: 1.12-6.76) for the family history of atopic dermatitis. For housing-related factors, including the presence of mold, mold spots, mold odor, cockroach, water damage, and incense burning, the random-effect pooled OR ranged from 1.43 to 1.73. Other risk factors with significant pooled OR for asthma development included male gender (1.30, 95% CI: 1.23-1.38), cigarette smoke exposure (1.44, 95% CI: 1.30-1.60), cigarette smoking (1.66, 95% CI: 1.44-1.90), body mass index (BMI)-related parameters (pooled OR ranged from 1.06 to 2.02), various types of air pollution (NO, PM10, and O; pooled OR ranged from 1.03 to 1.22), and pre- and perinatal factors (low birth weight, preterm birth, and cesarean section; pooled OR ranged from 1.14 to 1.32).

Conclusions: The family history of asthma was the most frequently reported risk factor for asthma development in Asia with the highest risk estimate for asthma development. This suggests a major role of the genetic component in asthma pathogenesis. Further study on asthma genetics is required to improve the current understanding of asthma etiology.

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