Estimates of the Prevalence of Autism Spectrum Disorder in the Middle East and North Africa Region: A Systematic Review and Meta-Analysis

Author:

Akomolafe Aishat F.ORCID,Abdallah Bushra M.ORCID,Mahmood Fathima R.ORCID,Elshoeibi Amgad M.ORCID,Al-Khulaifi Aisha AbdullaORCID,Mahmoud ElhassanORCID,Dweidri YaraORCID,Darwish NourORCID,Yousif DuaaORCID,Khalid Hafsa,Al-Theyab Majed,Azeem Muhammad Waqar,Shahwar Durre,Kamal Madeeha,Alabdulla Majid,Khaled Salma M.ORCID,Chivese TawandaORCID

Abstract

AbstractBackground and ObjectiveEstimates of the prevalence of the autism spectrum disorder (ASD) in the Middle East and North Africa (MENA) region are not readily available, amid a lack of recent evidence. In this study, we estimated the prevalence of ASD in the MENA region by synthesising evidence from published studies in the region.MethodsIn this systematic review and meta-analysis, we searched PubMed, EMBASE, Scopus, and CINAHL databases for studies which assessed ASD prevalence in the MENA region. Risk of bias was assessed using the Newcastle Ottawa scale. A bias-adjusted inverse variance heterogeneity meta-analysis model was used to pool prevalence estimates from included studies. Cochran’s Q statistic and the I2statistic were used to assess heterogeneity, and publication bias assessed using funnel and Doi plots.ResultsA total of 3075 studies were identified, 16 studies of which met the inclusion criteria and involved 3,727,731 individuals. The studies were published during the period 2007-2022, and included individuals from Iran, Oman, Libya, Egypt, Kingdom of Saudi Arabia (KSA), Lebanon, United Arab Emirates (UAE), Bahrain and Qatar. Estimates of ASD prevalence ranged from 0.01% in Oman during the period June 2009-December 2009, to a high of 2.51% in the Kingdom of Saudi Arabia during the period December 2017-March 2018. The pooled prevalence of ASD was 0.13% (95% CI: 0.01% – 0.33%), with significant heterogeneity (I2= 99.8%). For Iran, the only country with multiple analysable studies, an overall prevalence of 0.06% (95% CI: 0.00 – 0.19, I2=97.5%, n= 6 studies) was found. A review of data from countries with repeated studies suggested that the prevalence of ASD is increasing.ConclusionEstimates of the prevalence of ASD vary widely across the MENA region, from 0.01% in Oman to 2.51% in Saudi, with an overall prevalence of 0.13%. Existing data suggests a trend towards increasing prevalence in the region. More and better-quality research is needed to provide up to date ASD prevalence estimates.RegistrationThe protocol for this systematic review and meta-analysis was registered on the International Prospective Register of Systematic Reviews (PROSPERO) with registration ID CRD42024499837.

Publisher

Cold Spring Harbor Laboratory

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