Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Global and regional estimates of prevalence of amblyopia: A systematic review and meta-analysis

Tue Jul 5 18:01:24 2022

(2018) Global and regional estimates of prevalence of amblyopia: A systematic review and meta-analysis. Strabismus. pp. 1-16. ISSN 1744-5132 (Electronic) 0927-3972 (Linking)

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Official URL: https://www.ncbi.nlm.nih.gov/pubmed/30059649

Abstract

BACKGROUND: Amblyopia is one of the most important causes of vision impairment in the world, especially in children. Although its prevalence varies in different parts of the world, no study has evaluated its prevalence in different geographical regions comprehensively. The aim of the present study was to provide global and regional estimates of the prevalence of amblyopia in different age groups via a systematic search. METHODS: In this study, international databases, including Embase, Scopus, PubMed, Web of Science, and other relevant databases, were searched systematically to find articles on the prevalence of amblyopia in different age groups published in English. The prevalence and 95 CI were calculated using binomial distribution. The Cochran's Q-test and I(2) statistic were applied to assess heterogeneity, a random-effects model was used to estimate the pooled prevalence, and a meta-regression method was utilized to investigate the factors affecting heterogeneity between studies. RESULTS: Of 1252 studies, 73 studies were included in the analysis (sample volume: 530,252). Most of these studies (n = 25) were conducted in the WHO-Western Pacific Regional Office. The pooled prevalence estimate of amblyopia was 1.75 (95 CI: 1.62-1.88), with the highest estimate in European Regional Office (3.67, 95 CI: 2.89-4.45) and the lowest in African Regional Office (0.51, 95 CI: 0.24-0.78). The most common cause of amblyopia was anisometropia (61.64). The I(2) heterogeneity was 98 (p < 0.001). According to the results of univariate meta-regression, the variables of WHO region (b: 0.566, p < 0.001), sample size (b: -0.284 x 10(-4), p: 0.025), and criteria for definition of amblyopia (b: -0.292, p: 0.010) had a significant effect on heterogeneity between studies, while age group, publication date, and cause of amblyopia had no significant effect on heterogeneity. CONCLUSION: The prevalence of amblyopia varies in different parts of the world, with the highest prevalence in European countries. Geographical location and criteria for definition of amblyopia are among factors contributing to the difference across the world. The results of this study can help stakeholders to design health programs, especially health interventions and amblyopia screening programs.

Item Type: Article
Creators:
CreatorsEmail
Hashemi, H. MdUNSPECIFIED
Pakzad, R. MScUNSPECIFIED
Yekta, A. PhDUNSPECIFIED
Bostamzad, P. MdUNSPECIFIED
Aghamirsalim, M. MdUNSPECIFIED
Sardari, S. MScUNSPECIFIED
Valadkhan, M. MScUNSPECIFIED
Pakbin, M. MScUNSPECIFIED
Heydarian, S. PhDUNSPECIFIED
Khabazkhoob, M. PhDUNSPECIFIED
Keywords: Global prevalence amblyopia meta-analysis prevalence regional prevalence
Divisions:
Page Range: pp. 1-16
Journal or Publication Title: Strabismus
Journal Index: Pubmed
Identification Number: https://doi.org/10.1080/09273972.2018.1500618
ISSN: 1744-5132 (Electronic) 0927-3972 (Linking)
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/969

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