Prevalence and risk factors of refractive error: a cross-sectional Study in Han and Yi adults in Yunnan, China

Abstract Background Our study aimed to explore the prevalence and risk factors of refractive error (RE) in Han and Tibetan population aged 50–79 years in Xining and surrounding areas in Qinghai Province on Qinghai-Tibet Plateau. Methods As part of the China National Health Survey, our cross-sectional study compared the age-adjusted prevalence of RE in Han and Tibetan older adults aged 50–79 years in Xining and surrounding areas. A multivariate logistic regression model was used to identify risk factors for myopia and hyperopia. Results Among 769 Han participants and 476 Tibetan participants, the age-adjusted prevalence of myopia (spherical equivalent (SE) < − 0.5D), hyperopia (SE > + 0.5D), high myopia (SE < -6.0D) and astigmatism (cylindrical equivalent > = 0.5D) is 28.56, 22.82, 2.80, and 69.38%. Han participants have higher age-adjusted prevalence of myopia (32.93% vs 21.64%, p < 0.001), high myopia (3.93% vs 1.02%, p = 0.001) and astigmatism (72.14% vs 64.94%, p = 0.021) compared to Tibetan participants. Being Tibetan is the protective factor of myopia compared to being Han (OR 0.58, 95%CI 0.42–0.79, p < 0.001). Older age (p = 0.032), longer time length in rural area (p = 0.048), undergraduate/graduate education level (p = 0.031), lighter active level (p = 0.007) and lower BMI (p = 0.015) are risk factors for myopia. Older age (all p < 0.001) and pterygium status of the same eye (p = 0.013) also increase the hyperopia risk. Conclusions Our study found an overall prevalence of myopia of 28.56% in Xining and surrounding areas in adults older than 50 years. Han population has higher myopia risk than Tibetan population. More medical and social resources should be allocated to improve the vision and life quality of older adults.

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Prevalence and Risk Factors of Refractive Error in Qinghai, China: A Cross-Sectional Study in Han and Tibetan Adults in Xining and Surrounding Areas

10.21203/rs.3.rs-122810/v1 ◽

2020 ◽

Author(s):

Meng Wang ◽

Lingyang Gan ◽

Jiantao Cui ◽

Ting Chen ◽

Xianghua Wang ◽

...

Keyword(s):

Risk Factors ◽

Refractive Error ◽

High Myopia ◽

Cross Sectional Study ◽

Sectional Study ◽

Cross Sectional ◽

Han Population ◽

Tibetan Population ◽

Surrounding Areas ◽

Elder Adults

Abstract Background Our study aimed to explore the prevalence and risk factors of refractive error (RE) in Han and Tibetan population aged 50-79 years in Xining and surrounding areas in Qinghai Province on Qinghai-Tibet Plateau.Methods As part of the China National Health Survey, our cross-sectional study compared the age-adjusted prevalence of RE in Han and Tibetan elder adults aged 50-79 years in Xining and surrounding areas. A multivariate logistic regression model was used to identify risk factors for myopia and hyperopia.Results Among 769 Han participants and 476 Tibetan participants, the age-adjusted prevalence of myopia, hyperopia, high myopia and astigmatism were 28.56%, 22.82%, 2.80%, and 69.38%. Han population have higher age-adjusted prevalence of myopia (32.93% vs 21.64%, p<0.001), high myopia (3.93% vs 1.02%, p=0.001) and astigmatism (72.14% vs 64.94%, p=0.021) compared to Tibetan population. Being Tibetan is the protective factor of myopia compared to being Han (OR 0.58, 95%CI 0.42-0.79, p<0.001). Elder age (p=0.032), longer time length in rural area (p=0.048), undergraduate/graduate education level (p=0.031), lighter active level (p=0.007) and lower BMI index (p=0.015) are risk factors for myopia. Elder age (all p<0.001) and pterygium status of the same eye (p=0.013) also increases the hyperopia risk.Conclusions Our study found an overall prevalence of myopia of 28.56% in Xining and surrounding areas in adults elder than 50 years. Han population has higher myopia risk than Tibetan population. More medical and social resources should be allocated to improve the vision and life quality of elder adults.

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Prevalence and risk factors of uncorrected refractive error among an elderly Chinese population in urban China: a cross-sectional study

BMJ Open ◽

10.1136/bmjopen-2017-021325 ◽

2018 ◽

Vol 8 (3) ◽

pp. bmjopen-2017-021325

Author(s):

Hehua Ye ◽

Yiyong Qian ◽

Qi Zhang ◽

Xiaohong Liu ◽

Xuan Cai ◽

...

Keyword(s):

Risk Factors ◽

Visual Acuity ◽

Refractive Error ◽

Chinese Population ◽

Protective Factor ◽

Multiple Logistic Regression Analysis ◽

Cross Sectional Study ◽

Sectional Study ◽

Cross Sectional ◽

Uncorrected Refractive Error

ObjectivesTo investigate the prevalence and risk factors of uncorrected refractive error (URE) in an elderly urban Chinese population in China.DesignA population-based cross-sectional study.MethodsThe study was conducted using a cluster random sample of residents aged 50 years or older living in the Jiangning Road subdistrict, Shanghai, China. All participants underwent a standardised interview and eye examinations, including presenting visual acuity (PVA) and best-corrected visual acuity (BCVA) between November 2012 and February 2013. URE was defined as an improvement of two lines or more in the BCVA compared with the PVA in the better eye of <20/40.ResultsA total of 1999 subjects (an 82.5% response rate) completed both the questionnaire and ophthalmic examination. The prevalence of URE was 20.1% (95% CI 18.0% to 22.2%) in the study sample. After age standardisation, the prevalence of URE in Chinese people aged 50 years or older was 18.7% (95% CI 17.0% to 20.4%). Under multiple logistic regression analysis, older age (per 1-year increase, OR 1.04, 95% CI 1.03 to 1.05) and a lower level of education (OR 1.34, 95% CI 1.07 to 1.69) were significantly related to URE. A history of ocular diseases (OR 0.71, 95% CI 0.55 to 0.92) was a protective factor for URE.ConclusionsURE is highly prevalent among the elderly urban Chinese population, which should raise awareness of the URE burden in China to meet the Vision 2020 goal to eliminate preventable blindness.

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PRRSV: Risikofaktoren und Herdenprävalenz in Deutschland

Tierärztliche Praxis Ausgabe G Großtiere / Nutztiere ◽

10.1055/a-0867-8990 ◽

2019 ◽

Vol 47 (02) ◽

pp. 132-132

Author(s):

Sebastian Ganz

Keyword(s):

Risk Factors ◽

Cross Sectional Study ◽

Respiratory Syndrome Virus ◽

Sectional Study ◽

Cross Sectional ◽

Klinische Symptome

Nathues C, Janssen E, Duengelhoef A et al. Cross-sectional study on risk factors for Porcine Reproductive and Respiratory Syndrome virus sow herd instability in German breeding herds. Acta Vet Scand 2018; 60 (1): 1–8 In mit PRRSV (Porcine Reproductive and Respiratory Syndrom Virus) infizierten Schweinebeständen zeigen die Tiere oftmals ernsthafte klinische Symptome. Die Schwere der Symptomatik hängt von der Virulenz der jeweiligen Virusstämme ab. Deshalb ist die Impfung gegen diesen Erreger sinnvoll und wird empfohlen, auch wenn sie nicht immer klinische Fälle verhindert bzw. das Virus vollends eliminiert. Aufgrund dessen rückt die Prävention durch Verbesserung der innerbetrieblichen Abläufe zunehmend in den Fokus. Um solche Maßnahmen erfolgreich etablieren zu können, ist es wichtig, den epidemiologischen Status der Herde und mögliche Risikofaktoren zu kennen. Ziel der Studie war deshalb, die Prävalenz der Infektion in Sauenbetrieben in Norddeutschland zu eruieren und verschiedene Arbeitsabläufe hinsichtlich des Risikos der Erregerverbreitung zu untersuchen.

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