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• W2064795836 abstract "<b><i>Purpose:</i></b> This paper presents estimates of the prevalence of blindness and low vision among older adults over 50 years of age in mainland China. <b><i>Methods:</i></b> All primary reports of population-based studies that reported the prevalence or incidence of visual impairment among older populations in mainland China were identified. Twenty-four population-based studies were included in this systematic review. Blindness is defined as visual acuity of less than 3/60, or a corresponding visual-field loss to less than 10 degrees in the better eye with the best possible correction; low vision is defined as visual acuity of less than 6/18, but equal to or better than 3/60 in the better eye with the best possible correction. The pooled prevalence estimates of blindness and low vision were calculated assuming a random-effects model. Relative odds with 95% confidence intervals (95% CIs) were calculated, stratified by methodological and socioeconomic variables. <b><i>Results:</i></b> The overall pooled prevalence of blindness was 1.7% (95% CI 1.4–2.1). The results of the meta-regression showed the significance of a predictor variable: geographic region. The blindness rates per 100 older adults in various regions were 1.4 (0.9–2.0) in East China, and 1.4 (1.0–2.0) in Central China and 2.5 (1.9–3.2) in Western China. The overall pooled prevalence of low vision was 4.1% (3.4–5.1) and the independent pooled prevalence rates stratified by geographic region were 3.6% (2.6–5.1) in East China, 3.6% (2.4–5.2) in Central China and 5.2% (3.6–7.4) in Western China. <b><i>Conclusions:</i></b> Blindness or low vision affects approximately 5.8% Chinese adults older than 50 years. The prevalence of visual impairment, and especially blindness, vary greatly by the developmental status of geographic region." @default.
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• W2064795836 date "2012-09-05" @default.
• W2064795836 modified "2023-10-16" @default.
• W2064795836 title "The Prevalence of Visual Impairment in Older Adults in Mainland China: A Systematic Review and Meta-Analysis" @default.
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• W2064795836 doi "https://doi.org/10.1159/000327144" @default.
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