Vision impairment, vision correction, and cognitive decline among middle-aged and older Chinese: results from the China health and retirement longitudinal study. (2nd November 2021)

• Record Type: Journal Article
• Authors: Cao, Gui-Ying; Yao, Shan-Shan; Wang, Kaipeng; Han, Ling; Chen, Zi-Shuo; Huang, Zi-Ting; Zhang, Qin; Wang, Chunxiu; Hu, Yong-Hua; Xu, Beibei
• Is Part Of: Aging & mental health. Volume 25:Number 11(2021)
• Page Start: 2028
• Page End: 2035
• Publication Date: 2021-11-02
• Subjects: Vision impairment -- vision correction -- cognitive function; Older people -- Mental health -- Periodicals; Geriatric psychiatry -- Periodicals; Older people -- Psychology -- Periodicals; Aging -- Psychological aspects -- Periodicals; Aged -- psychology -- periodicals; Mental Health -- periodicals; Mental Health Services -- periodicals; Aging -- psychology -- periodicals; Aged, 80 and over -- psychology -- periodicals; 618.97689
• DOI: 10.1080/13607863.2020.1828271
• Languages: English
• ISSNs: 1360-7863

Abstract

Abstract: Objectives: To investigate the associations between vision impairment (VI), vision correction (VC), and cognitive function. Method: We included 20, 677 participants aged ≥45 years from the China Health and Retirement Longitudinal Study (2011–2015). Participants were grouped into no VI, distance VI (DVI) only, near VI (NVI) only, or both distance and near VI (DNVI), and VI(+)/VC(−), VI(+)/VC(+), VI(−)/VC(−), or VI(−)/VC(+) further at baseline. Cognitive function at baseline and subsequently every two years was applied as a dependent variable in a generalized estimating equation model. Results: DVI only, NVI only, and DNVI had significantly worse cognitive function over time than no VI (all p < .05). DNVI had significantly worse cognitive function over time than DVI only and NVI only (all p < .001). VI(+)/VC(+), VI(−)/VC(−), and VI(−)/VC(+) had significantly better cognitive function over time than VI(+)/VC(−) (all p < .05). VI(−)/VC(+) had significantly better cognitive function over time than VI(+)/VC(+) and VI(−)/VC(−) (all p < .05). Conclusion: Cognitive function was worse in middle-aged and older Chinese with VI, especially in those with DNVI. VC was associated with better cognitive function over time regardless of the status of vision.