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Table 6 Factors associated with risks of developing subtypes of cataracts - Final model (N = 11,591)

From: Cataract subtype risk factors identified from the Korea National Health and Nutrition Examination survey 2008–2010

  Pure Cortical type n = 7008 Pure Nuclear type Pure PSCO type Mixed type
Multivariate OR p value Multivariate OR p value Multivariate OR p value Multivariate OR p value
1. Socio-demographic factors
Age (years)         
  40–49 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  50–59 2.8 <0.01 4.1 <0.01 3.2 0.07 4.1 <0.01
  60–69 9.0 <0.01 15.7 <0.01 6.9 <0.01 22.6 <0.01
  70–80 26.4 <0.01 44.8 <0.01 24.1 <0.01 104.3 <0.01
  80+ 59.6 <0.01 138.2 <0.01 135.9 <0.01 414.0 <0.01
Sex         
  Men 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  Women 0.9 0.07 1.0 0.87 1.0 0.92 1.1 0.50
Monthly household income
  Lowest quintile 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  2nd to 4th quintile 0.7 <0.01 1.0 0.97 0.5 0.07 0.8 0.02
  Highest quintile 0.7 <0.01 1.0 0.78 0.4 0.12 0.6 <0.01
Education         
  Elementary school 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  Middle school 0.8 0.11 0.8 0.02 0.7 0.52 0.8 0.11
  High school 0.6 <0.01 0.8 0.02 1.0 0.93 0.6 <0.01
  Univ. or higher 0.5 <0.01 0.6 <0.01 0.9 0.93 0.9 0.56
2. Health examination variable
Hypercholesterolemia        
  No 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  Yes 1.3 0.02 1.0 0.61 1.6 0.28 1.1 0.26
Anemia         
  No 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  Yes 0.9 0.70 1.1 0.29 1.0 0.96 1.3 0.12
Metabolic syndrome
  No 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  Yes 0.9 0.23 1.2 0.02 0.6 0.17 1.2 0.13
3. Comorbidities
Hypertension         
  No 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  Yes 1.2 0.14 1.0 0.88 1.1 0.86 1.2 0.16
Diabetic mellitus         
  No 1.0 (ref)   1.0 (ref)   1.0 (ref)   1.0 (ref)  
  Yes 1.3 0.05 1.4 <0.01 2.7 0.04 1.4 0.02