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Table 3 Univariate and multivariate analysis of visual impairment and correctable visual impairment for a 6/12 cutoff

From: Visual impairment and spectacle coverage rate in Baoshan district, China: population-based study

Characteristic No VI VI Correctable VI
  n n Univariate odds ratio (95% CI) Multivariate odds ratio (95% CI) n Univariate odds ratio (95% CI) Multivariate odds ratio (95% CI)
Age,y        
60-69 2523 370 1.00(reference) 1.00(reference) 274 1.00(reference) 1.00(reference)
70-79 777 319 2.80***(2.36-3.32) 2.62***(2.19-3.13) 196 2.32***(1.90-2.84) 2.24***(1.82-2.76)
80~ 233 284 8.31***(6.77-10.20) 7.48***(6.00-9.33) 129 5.10***(3.98-6.54) 4.80***(3.69-6.26)
Gender        
Male 1574 319 1.00(reference) 1.00(reference) 207 1.00(reference) 1.00(reference)
Female 1959 654 1.65***(1.42-1.91) 1.67***(1.42-1.97) 392 1.52***(1.27-1.82) 1.56***(1.29-1.88)
Type of insurance        
No insurance 16 4 1.00(reference) 1.00(reference) 3 1.00(reference) 1.00(reference)
Urban insurance 1749 503 1.15(0.38-3.46) 1.24(0.38-4.06) 306 0.93(0.27-3.22) 1.02(0.28-3.72)
Others 1768 466 1.05(0.35-3.17) 1.02(0.31-3.34) 290 0.88(0.25-3.02) 0.88(0.24-3.21)
Occupation        
Peasant 973 245 0.89(0.75-1.04) 0.73***(0.60-0.89) 156 0.93(0.76-1.13) 0.80(0.64-1.01)
Non-peasant 2560 728 1.00(reference) 1.00(reference) 443 1.00(reference) 1.00(reference)
Level of education        
Illiteracy 417 253 1.00(reference) 1.00(reference) 128 1.00(reference) 1.00(reference)
Primary school 1825 480 0.43***(0.36-0.52) 0.74**(0.60-0.93) 304 0.54***(0.43-0.69) 0.81(0.62-1.06)
Secondary school or higher 1291 240 0.31***(0.25-0.38) 0.55***(0.42-0.71) 167 0.42***(0.33-0.54) 0.65**(0.48-0.89)
  1. CI=confidence interval.
  2. * Significant at P <0.05.
  3. ** Significant at P <0.01.
  4. *** Significant at P <0.001.