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Prevalence and associations of cataract in a rural Chinese adult population: the Handan Eye Study

Background Cataract remains the leading cause of blindness and visual impairment in the world and in China. However, data on the prevalence of cataract based on standardized lens grading protocols from mainland China are limited. This paper estimated the age- and gender-specific prevalence and risk... Full description

Journal Title: Graefe's archive for clinical and experimental ophthalmology 2012-04-11, Vol.251 (1), p.203-212
Main Author: Duan, Xin Rong
Other Authors: Liang, Yuan Bo , Wang, Ning Li , Wong, Tien Yin , Sun, Lan Ping , Yang, Xiao Hui , Tao, Qiu Shan , Yuan, Rui Zhi , Friedman, David S
Format: Electronic Article Electronic Article
Language: English
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Publisher: Berlin/Heidelberg: Springer-Verlag
ID: ISSN: 0721-832X
Link: https://www.ncbi.nlm.nih.gov/pubmed/22527317
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recordid: cdi_proquest_miscellaneous_1273204383
title: Prevalence and associations of cataract in a rural Chinese adult population: the Handan Eye Study
format: Article
creator:
  • Duan, Xin Rong
  • Liang, Yuan Bo
  • Wang, Ning Li
  • Wong, Tien Yin
  • Sun, Lan Ping
  • Yang, Xiao Hui
  • Tao, Qiu Shan
  • Yuan, Rui Zhi
  • Friedman, David S
subjects:
  • Adult
  • Age Distribution
  • Aged
  • Asian Continental Ancestry Group - ethnology
  • Cataract - classification
  • Cataract - ethnology
  • Cataract Extraction - statistics & numerical data
  • China - epidemiology
  • Female
  • Humans
  • Male
  • Medicine
  • Medicine & Public Health
  • Middle Aged
  • Miscellaneous
  • Ophthalmology
  • Prevalence
  • Risk Factors
  • Rural Population - statistics & numerical data
  • Sex Distribution
ispartof: Graefe's archive for clinical and experimental ophthalmology, 2012-04-11, Vol.251 (1), p.203-212
description: Background Cataract remains the leading cause of blindness and visual impairment in the world and in China. However, data on the prevalence of cataract based on standardized lens grading protocols from mainland China are limited. This paper estimated the age- and gender-specific prevalence and risk factor for cataract Methods In a population-based Chinese sample, participants underwent a comprehensive ophthalmic examination, including assessment of cortical, nuclear, posterior subcapsular (PSC) and mixed lens opacities from slit-lamp grading using the Lens Opacities Classification System III. Results Of the 7,557 eligible subjects, 6,830 took part in the study (90.4 % response rate), and 6,544 participants (95.8 %, mean age 52.0 ± 11.8 years) had lens data for analyses. The prevalence of any cataract surgery in at least one eye was 0.8 % (95 % confidence interval [CI], 0.62, 1.06), with similar rates between men and women. The overall prevalence of any cataract or cataract surgery was 20.8 % (95 % CI, 19.8, 21.8), higher in women than in men after adjusting for age (23.6 % vs 17.6 %; OR: 1.78; 95 % CI: 1.54–2.07). When distinct lens opacity was categorized in each eye as cortical, nuclear, PSC or mixed, based on one randomly selected eye, cortical cataract was the most common distinct subtype (12.3 %), followed by mixed (3.2 %), nuclear (1.7 %), and PSC (0.2 %) cataract. The prevalence of all lens opacities increased with age ( P  
language: eng
source:
identifier: ISSN: 0721-832X
fulltext: no_fulltext
issn:
  • 0721-832X
  • 1435-702X
url: Link


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titlePrevalence and associations of cataract in a rural Chinese adult population: the Handan Eye Study
creatorDuan, Xin Rong ; Liang, Yuan Bo ; Wang, Ning Li ; Wong, Tien Yin ; Sun, Lan Ping ; Yang, Xiao Hui ; Tao, Qiu Shan ; Yuan, Rui Zhi ; Friedman, David S
creatorcontribDuan, Xin Rong ; Liang, Yuan Bo ; Wang, Ning Li ; Wong, Tien Yin ; Sun, Lan Ping ; Yang, Xiao Hui ; Tao, Qiu Shan ; Yuan, Rui Zhi ; Friedman, David S
descriptionBackground Cataract remains the leading cause of blindness and visual impairment in the world and in China. However, data on the prevalence of cataract based on standardized lens grading protocols from mainland China are limited. This paper estimated the age- and gender-specific prevalence and risk factor for cataract Methods In a population-based Chinese sample, participants underwent a comprehensive ophthalmic examination, including assessment of cortical, nuclear, posterior subcapsular (PSC) and mixed lens opacities from slit-lamp grading using the Lens Opacities Classification System III. Results Of the 7,557 eligible subjects, 6,830 took part in the study (90.4 % response rate), and 6,544 participants (95.8 %, mean age 52.0 ± 11.8 years) had lens data for analyses. The prevalence of any cataract surgery in at least one eye was 0.8 % (95 % confidence interval [CI], 0.62, 1.06), with similar rates between men and women. The overall prevalence of any cataract or cataract surgery was 20.8 % (95 % CI, 19.8, 21.8), higher in women than in men after adjusting for age (23.6 % vs 17.6 %; OR: 1.78; 95 % CI: 1.54–2.07). When distinct lens opacity was categorized in each eye as cortical, nuclear, PSC or mixed, based on one randomly selected eye, cortical cataract was the most common distinct subtype (12.3 %), followed by mixed (3.2 %), nuclear (1.7 %), and PSC (0.2 %) cataract. The prevalence of all lens opacities increased with age ( P  < 0.001). After excluding other causes for visual impairment, the proportion of people with best corrected visual acuity <20/60 was 21 % among those with PSC, and 12 % among those with mixed opacities in the better-seeing eye. In multivariable logistic regression models, myopia was associated with all cataract types, while higher fasting plasma glucose and diabetes were only associated with PSC cataract. Conclusions Cataract affects 20 % of the population aged 30 years and older living in rural China, with cortical cataract the most common subtype. Risk factors for cataract include myopia and diabetes.
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subjectAdult ; Age Distribution ; Aged ; Asian Continental Ancestry Group - ethnology ; Cataract - classification ; Cataract - ethnology ; Cataract Extraction - statistics & numerical data ; China - epidemiology ; Female ; Humans ; Male ; Medicine ; Medicine & Public Health ; Middle Aged ; Miscellaneous ; Ophthalmology ; Prevalence ; Risk Factors ; Rural Population - statistics & numerical data ; Sex Distribution
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descriptionBackground Cataract remains the leading cause of blindness and visual impairment in the world and in China. However, data on the prevalence of cataract based on standardized lens grading protocols from mainland China are limited. This paper estimated the age- and gender-specific prevalence and risk factor for cataract Methods In a population-based Chinese sample, participants underwent a comprehensive ophthalmic examination, including assessment of cortical, nuclear, posterior subcapsular (PSC) and mixed lens opacities from slit-lamp grading using the Lens Opacities Classification System III. Results Of the 7,557 eligible subjects, 6,830 took part in the study (90.4 % response rate), and 6,544 participants (95.8 %, mean age 52.0 ± 11.8 years) had lens data for analyses. The prevalence of any cataract surgery in at least one eye was 0.8 % (95 % confidence interval [CI], 0.62, 1.06), with similar rates between men and women. The overall prevalence of any cataract or cataract surgery was 20.8 % (95 % CI, 19.8, 21.8), higher in women than in men after adjusting for age (23.6 % vs 17.6 %; OR: 1.78; 95 % CI: 1.54–2.07). When distinct lens opacity was categorized in each eye as cortical, nuclear, PSC or mixed, based on one randomly selected eye, cortical cataract was the most common distinct subtype (12.3 %), followed by mixed (3.2 %), nuclear (1.7 %), and PSC (0.2 %) cataract. The prevalence of all lens opacities increased with age ( P  < 0.001). After excluding other causes for visual impairment, the proportion of people with best corrected visual acuity <20/60 was 21 % among those with PSC, and 12 % among those with mixed opacities in the better-seeing eye. In multivariable logistic regression models, myopia was associated with all cataract types, while higher fasting plasma glucose and diabetes were only associated with PSC cataract. Conclusions Cataract affects 20 % of the population aged 30 years and older living in rural China, with cortical cataract the most common subtype. Risk factors for cataract include myopia and diabetes.
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abstractBackground Cataract remains the leading cause of blindness and visual impairment in the world and in China. However, data on the prevalence of cataract based on standardized lens grading protocols from mainland China are limited. This paper estimated the age- and gender-specific prevalence and risk factor for cataract Methods In a population-based Chinese sample, participants underwent a comprehensive ophthalmic examination, including assessment of cortical, nuclear, posterior subcapsular (PSC) and mixed lens opacities from slit-lamp grading using the Lens Opacities Classification System III. Results Of the 7,557 eligible subjects, 6,830 took part in the study (90.4 % response rate), and 6,544 participants (95.8 %, mean age 52.0 ± 11.8 years) had lens data for analyses. The prevalence of any cataract surgery in at least one eye was 0.8 % (95 % confidence interval [CI], 0.62, 1.06), with similar rates between men and women. The overall prevalence of any cataract or cataract surgery was 20.8 % (95 % CI, 19.8, 21.8), higher in women than in men after adjusting for age (23.6 % vs 17.6 %; OR: 1.78; 95 % CI: 1.54–2.07). When distinct lens opacity was categorized in each eye as cortical, nuclear, PSC or mixed, based on one randomly selected eye, cortical cataract was the most common distinct subtype (12.3 %), followed by mixed (3.2 %), nuclear (1.7 %), and PSC (0.2 %) cataract. The prevalence of all lens opacities increased with age ( P  < 0.001). After excluding other causes for visual impairment, the proportion of people with best corrected visual acuity <20/60 was 21 % among those with PSC, and 12 % among those with mixed opacities in the better-seeing eye. In multivariable logistic regression models, myopia was associated with all cataract types, while higher fasting plasma glucose and diabetes were only associated with PSC cataract. Conclusions Cataract affects 20 % of the population aged 30 years and older living in rural China, with cortical cataract the most common subtype. Risk factors for cataract include myopia and diabetes.
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pmid22527317
doi10.1007/s00417-012-2012-x
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