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      Prevalence and risk factors of epiretinal membranes: a systematic review and meta-analysis of population-based studies

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          Abstract

          Objective

          This study was to aggregate the prevalence and risks of epiretinal membranes (ERMs) and determine the possible causes of the varied estimates.

          Design

          Systematic review and meta-analysis.

          Data sources

          The search strategy was designed prospectively. We searched PubMed, Embase and Web of Science databases from inception to July 2016. Reference lists of the included literatures were reviewed as well.

          Study selection

          Surveys published in English language from any population were included if they had a population-based design and reported the prevalence of ERM from retinal photography with or without optical coherence tomography. Eligibility and quality evaluation was conducted independently by two investigators.

          Data extraction

          The literature search generated 2144 records, and 13 population-based studies comprising 49 697 subjects were finally included. The prevalence of ERM and the ORs of potential risk factors (age, sex, myopia, hypertension and so on) were extracted.

          Results

          The pooled age-standardised prevalence estimates of earlier ERM (cellophane macular reflex (CMR)), advanced ERM (preretinal macular fibrosis (PMF)) and any ERM were 6.5% (95% CI 4.2% to 8.9%), 2.6% (95% CI 1.8% to 3.4%) and 9.1% (95% CI 6.0% to 12.2%), respectively. In the subgroup analysis, race and photography modality contributed to the variation in the prevalence estimates of PMF, while the WHO regions and image reading methods were associated with the varied prevalence of CMR and any ERM. Meta-analysis showed that only greater age and female significantly conferred a higher risk of ERMs.

          Conclusions

          Our findings suggest that ERMs are relatively common among aged population. Race, image taking and reading methodology may play important roles in influencing the large variability of ERM prevalence estimates.

          Related collections

          Most cited references23

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          Choroidal vascularity index as a measure of vascular status of the choroid: Measurements in healthy eyes from a population-based study

          The vascularity of the choroid has been implicated in the pathogenesis of various eye diseases. To date, no established quantifiable parameters to estimate vascular status of the choroid exists. Choroidal vascularity index (CVI) may potentially be used to assess vascular status of the choroid. We aimed to establish normative database for CVI and identify factors associated with CVI in healthy eyes. In this population-based study on 345 healthy eyes, choroidal enhanced depth imaging optical coherence tomography scans were segmented by modified image binarization technique. Total subfoveal choroidal area (TCA) was segmented into luminal (LA) and stromal (SA) area. CVI was calculated as the proportion of LA to TCA. Linear regression was used to identify ocular and systemic factors associated with CVI and subfoveal choroidal thickness (SFCT). Subfoveal CVI ranged from 60.07 to 71.27% with a mean value of 65.61 ± 2.33%. CVI was less variable than SFCT (coefficient of variation for CVI was 3.55 vs 40.30 for SFCT). Higher CVI was associated with thicker SFCT, but not associated with most physiological variables. CVI was elucidated as a significant determinant of SFCT. While SFCT was affected by many factors, CVI remained unaffected suggesting CVI to be a more robust marker of choroidal diseases.
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            The prevalence of age-related macular degeneration in Asians: a systematic review and meta-analysis.

            To determine the prevalence of age-related macular degeneration (AMD) in Asian populations and to compare this with prevalence in white populations. A clear understanding of AMD prevalence in Asians is essential to meet future demands for eye health care. We searched published literature reporting AMD prevalence in Asian populations. We limited studies examined to those using standardized grading systems (either the Wisconsin Age-Related Maculopathy Grading System or the international classification proposed by the International ARM Epidemiological Study Group). We used metaanalytical methods to calculate age-specific pooled prevalence of AMD using inverse-variance weighting in a random effect model. We also calculated pooled estimates of age-standardized prevalence. A metaregression model was used to examine gender differences and differences between Asian and white populations. We identified 9 studies reporting AMD prevalence from 4 Asian populations. Pooled prevalence estimates of early and late AMD in Asian populations aged 40 to 79 years were 6.8% (95% confidence interval [CI], 4.6%-8.9%) and 0.56% (95% CI, 0.30%-0.81%), respectively; corresponding prevalence estimates in white populations were 8.8% (95% CI, 3.8%-13.8%) and 0.59% (95% CI, 0.35%-0.84%), respectively. Reliable prevalence estimates of AMD in Asian persons aged > or =80 years were not available owing to small subject numbers in this age category. Among persons aged 40 to 79 years, the age-specific prevalence of late AMD in Asians was comparable with that reported from white populations, but early AMD signs were less common among Asians. Further studies in Asian populations are warranted to investigate whether certain specific AMD phenotypes or subtypes, such as polypoidal choroidal vasculopathy, are more common. Copyright 2010 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.
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              Idiopathic epiretinal membrane.

              Idiopathic epiretinal membrane (iERM) is a fibrocellular membrane that proliferates on the inner surface of the retina at the macular area. Membrane contraction is an important sight-threatening event and is due to fibrotic remodeling.

                Author and article information

                Journal
                BMJ Open
                BMJ Open
                bmjopen
                bmjopen
                BMJ Open
                BMJ Publishing Group (BMA House, Tavistock Square, London, WC1H 9JR )
                2044-6055
                2017
                25 September 2017
                : 7
                : 9
                : e014644
                Affiliations
                [1 ] departmentState Key Laboratory of Ophthalmology , Zhongshan Ophthalmic Center, Sun Yat-sen University , Guangzhou, China
                [2 ] departmentCentre for Eye Research Australia , University of Melbourne, Royal Victorian Eye and Ear Hospital , Melbourne, Victoria, Australia
                Author notes
                [Correspondence to ] Professor Mingguang He; mingguang.he@ 123456unimelb.edu.au
                Article
                bmjopen-2016-014644
                10.1136/bmjopen-2016-014644
                5623383
                28951399
                06a521f1-69ea-4454-a19c-22aa4dbecbde
                © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

                This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

                History
                : 11 October 2016
                : 31 July 2017
                : 14 August 2017
                Funding
                Funded by: FundRef http://dx.doi.org/10.13039/501100001809, National Natural Science Foundation of China;
                Funded by: The Fundamental Research Funds of the State Key Laboratory of Ophthalmology;
                Funded by: Science and Technology Planning Project of Guangdong Province;
                Categories
                Ophthalmology
                Research
                1506
                Custom metadata
                unlocked

                Medicine
                epiretinal membranes,prevalence,risk factors,meta-analysis,population-based
                Medicine
                epiretinal membranes, prevalence, risk factors, meta-analysis, population-based

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