1.29-1.88) were significantly associated with correctable visual impairment. A higher level

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A higher level of education, e.g., junior high school or higher, (OR, 0.65; 95 CI, 0.48?.89) was a protective factor for Earlier visits or injections look at lowered VIT dose ?Intercurrent illness look at correctable visual impairment. BMC Public Health 2013, 13:311 http://www.biomedcentral.com/1471-2458/13/Page 7 ofTable 3 Univariate and multivariate analysis of visual impairment and correctable visual impairment for a 6/12 cutoffCharacteristic No VI n Age,y 60-69 70-79 80 Gender Male Female Type of insurance No insurance Urban insurance Others Occupation Peasant Non-peasant Level of education Illiteracy Primary school 417 253 1825 480 1.00(reference) 0.43***(0.36-0.52) 0.31***(0.25-0.38) 1.00(reference) 0.74**(0.60-0.93) 0.55***(0.42-0.71) 128 304 167 1.00(reference) 0.54***(0.43-0.69) 0.42***(0.33-0.54) 1.00(reference) 0.81(0.62-1.06) 0.65**(0.48-0.89) 973 245 2560 728 0.89(0.75-1.04) 1.00(reference) 0.73***(0.60-0.89) 1.00(reference) 156 443 0.93(0.76-1.13) 1.00(reference) 0.80(0.64-1.01) 1.00(reference) 16 4 1.00(reference) 1.15(0.38-3.46) 1.05(0.35-3.17) 1.00(reference) 1.24(0.38-4.06) 1.02(0.31-3.34) 3 306 290 1.00(reference) 0.93(0.27-3.22) 0.88(0.25-3.02) 1.00(reference) 1.02(0.28-3.72) 0.88(0.24-3.21) 1574 319 1959 654 1.00(reference) 1.65***(1.42-1.91) 1.00(reference) 1.67***(1.42-1.97) 207 392 1.00(reference) 1.52***(1.27-1.82) 1.00(reference) 1.56***(1.29-1.88) 2523 370 777 319 233 284 1.00(reference) 2.80***(2.36-3.32) 8.31***(6.77-10.20) 1.00(reference) 2.62***(2.19-3.13) 7.48***(6.00-9.33) 274 196 129 1.00(reference) 2.32***(1.90-2.84) 5.10***(3.98-6.54) 1.00(reference) 2.24***(1.82-2.76) 4.80***(3.69-6.26) n VI Univariate odds ratio (95 CI) Multivariate odds ratio (95 CI) n Correctable VI Univariate odds ratio (95 CI) Multivariate odds ratio (95 CI)1749 503 1768Secondary school or 1291 240 higherCI=confidence interval.1.29-1.88) were significantly associated with correctable visual impairment. A higher level of education, e.g., junior high school or higher, (OR, 0.65; 95 CI, 0.48?.89) was a protective factor for correctable visual impairment. Career and the types of insurance showed no significant association with correctable visual impairment. Table 4 showed the improvement in the participants' vision by correcting their undercorrected refractive errors. Utilization of appropriate spectacles improved the visual acuity by at least one title= fnins.2015.00094 line in 45.43 (95 CI, 43.99 to 46.88 ) of the studied population and as high as four lines or more in 5.79 (95 CI, 5.11 to 6.47 ). These figures were more pronounced among participants with visual impairment, especially in severe/moderate visual impairment. Among 572 participants (12.59 ) who had mild visual impairment according to the aforementioned definition with a presenting visual acuity worse than 20/40 in the better eye, only 88 subjects (15.38 ) had no improvement after correction, while 12.76 (95 CI, 10.03 to 15.50 ) could experience a four line improvement by wearing proper spectacles.