Prevalence of Blindness and Visual Impairment

We assessed the prevalence of blindness, moderate to severe VI, and mild VI (reported as means with 95% CIs) using SPSS for Windows, version 25.0 (SPSS Institute), and we performed a binary regression analysis of the association between the prevalence of moderate to severe VI or blindness and other demographic, clinical, and ocular factors.^{23 (link)} This analysis was followed by a multivariable regression analysis, with the prevalence of blindness or moderate to severe VI as the dependent variable and all factors that were significantly associated with prevalence as independent variables in the univariate analyses. We then removed, in a step-by-step manner, those factors from the list of independent variables that had collinearity with other factors and that were no longer significantly associated with the prevalence of moderate to severe VI or blindness. We calculated the odds ratios (ORs) and their 95% CIs. The significance threshold was 2-sided P < .05.

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Bikbov M.M., Kazakbaeva G.M., Rakhimova E.M., Rusakova I.A., Fakhretdinova A.A., Tuliakova A.M., Panda-Jonas S., Gilmanshin T.R., Zainullin R.M., Bolshakova N.I., Safiullina K.R., Gizzatov A.V., Ponomarev I.P., Yakupova D.F., Baymukhametov N.E., Nikitin N.A, & Jonas J.B. (2021). Prevalence Factors Associated With Vision Impairment and Blindness Among Individuals 85 Years and Older in Russia. JAMA Network Open, 4(8), e2121138.

Publication 2021

SPSS for Windows, version 25.0

Blindness Ocular

Corresponding Organization : Institute of Molecular and Clinical Ophthalmology Basel

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Variable analysis

independent variables

Demographic factors
Clinical factors
Ocular factors

dependent variables

Prevalence of blindness
Prevalence of moderate to severe VI
Prevalence of mild VI

control variables

Not explicitly mentioned

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