《Table 2 Prevalence with 95%confidence intervals of VD in older adults aged 65y and above》

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《The association between socioeconomic status and visual disability among older adults in China》

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VD:Visual disability.The Waldχ2 test was used to determine the prevalence of VD within demographic and SES variables.In each category of independent variables，the prevalence of VD within areas of residence（urban and rural）was also tested by the Waldχ2

Tables 4 and 5 present the degree of association between SES and VD among the elderly in both urban and rural areas.Theresults show that the association between SES and VD remains strong，even in residence subgroups.It is of interest that the OR of the lowest individual SES is higher in urban areas than in rural areas（e.g.adults who are illiterate compared to those educated to senior-high-school level and adults with the lowest household income per capita compared to the highest）.Illiterate older adults living in urban areas had a greater likelihood of contracting a VD than those who graduated from senior high school，with an OR of 2.63（95%CI:2.27-3.04），while in rural areas，the OR is 2.21（95%CI:1.75-2.79）.