ReviewGenes2020
Hearing Impairment Overview in Africa: the Case of Cameroon.
Review in Genes, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
18 citing papers in PubMed, 3 syntheses or guidelines pooled it, 36 citations in OpenAlex.
- Integration of ear and hearing care services in low- and middle-income health systems: a systematic review and qualitative synthesis.Global health action · 2026Pooled it
- In pursuit of increasing the application of tele-audiology in South Africa: COVID-19 puts on the alert for patient site facilitator training.The South African journal of communication disorders = Die Suid-Afrikaanse tydskrif vir Kommunikasieafwykings · 2022Pooled it
- Hearing Impairment in South Africa and the Lessons Learned for Planetary Health Genomics: A Systematic Review.Omics : a journal of integrative biology · 2022Pooled it
- Exome sequencing identifies known and candidate genes in hearing impairment in Cameroon.Communications medicine · 2026Article
- Depression and associated factors among primary school adolescents with hearing impairment in Kampala district, Uganda: A cross-sectional study.PLOS mental health · 2026Article
- An Ontology-Based Expert System Approach for Hearing Aid Fitting in a Chaotic Environment.Audiology research · 2025Article
- Family-Centred Early Hearing Detection and Intervention in the African Context: Relevance and Responsiveness to African Culture.Audiology research · 2025Review
- Hearing loss characteristics and cerumen management efficacy in low-income South African communities: a cross-sectional study.Primary health care research & development · 2025Article
- Article
- The Otoacoustic Emissions in the Universal Neonatal Hearing Screening: A Scoping Review Update on the African Data (2004 to 2024).Children (Basel, Switzerland) · 2025Review
- Whole-exome sequencing reveals known and candidate genes for hearing impairment in Mali.HGG advances · 2025Article
- Development of the inner ear and regeneration of hair cells after hearing impairment.Fundamental research · 2025Review
- The analyses of human MCPH1 DNA repair machinery and genetic variations.Open medicine (Warsaw, Poland) · 2024Article
- Hearing loss in Africa: current genetic profile.Human genetics · 2022Review
- A novel variant inExperimental biology and medicine (Maywood, N.J.) · 2021Article
- Knowledge and Challenges Associated With Hearing Impairment in Affected Individuals From Cameroon (Sub-Saharan Africa).Frontiers in rehabilitation sciences · 2021Article
- Etiologies of Childhood Hearing Impairment in Schools for the Deaf in Mali.Frontiers in pediatrics · 2021Article
- Bi-Allelic Novel Variants inGenes · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 3 institutions in 3 countries.
Funding
Abstract
The incidence of hearing impairment (HI) is higher in low- and middle-income countries when compared to high-income countries. There is therefore a necessity to estimate the burden of this condition in developing world. The aim of our study was to use a systematic approach to provide summarized data on the prevalence, etiologies, clinical patterns and genetics of HI in Cameroon. We searched PubMed, Scopus, African Journals Online, AFROLIB and African Index Medicus to identify relevant studies on HI in Cameroon, published from inception to 31 October, 2019, with no language restrictions. Reference lists of included studies were also scrutinized, and data were summarized narratively. This study is registered with PROSPERO, number CRD42019142788. We screened 333 records, of which 17 studies were finally included in the review. The prevalence of HI in Cameroon ranges from 0.9% to 3.6% in population-based studies and increases with age. Environmental factors contribute to 52.6% to 62.2% of HI cases, with meningitis, impacted wax and age-related disorder being the most common ones. Hereditary HI comprises 0.8% to 14.8% of all cases. In 32.6% to 37% of HI cases, the origin remains unknown. Non-syndromic hearing impairment (NSHI) is the most frequent clinical entity and accounts for 86.1% to 92.5% of cases of HI of genetic origin. Waardenburg and Usher syndromes account for 50% to 57.14% and 8.9% to 42.9% of genetic syndromic cases, respectively. No pathogenic mutation was described in
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Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.