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Table 3 Odds ratios (OR) and 95% confidence intervals (CI) of cataract (all types) for categories of corrected and non-corrected outdoor exposure

From: Years of sunlight exposure and cataract: a case-control study in a Mediterranean population

  Outdoor exposure from 10 am-4 pm corrected for protective factors (years; fifths)
  < 0.073* 0.073 – 0.190 0.191 – 0.428 0.429 – 0.800 > 0.800 Trend test (p-value)
No. of cases = 332 72 56 74 59 71  
No. of controls = 327 66 65 66 65 65  
OR† 1 0.80 1.06 0.84 0.99 0.98
(95% CI)   (0.49, 1.31) (0.65, 1.71) (0.51, 1.37) (0.61, 1.61)  
OR§ 1 0.97 1.03 0.84 0.99 0.81
(95% CI)   (0.56, 1.68) (0.60, 1.76) (0.48, 1.45) (0.57, 1.73)  
  Outdoor exposure from 10 am-4 pm (years; fifths)
  < 0.312* 0.312 – 0.612 0.613 – 0.968 0.969 – 1.428 > 1.428 Trend test (p-value)
No. of cases = 332 73 57 65 43 94  
No. of controls = 327 66 65 66 65 65  
OR† 1 0.81 0.91 0.58 1.20 0.49
(95% CI)   (0.47, 1.38) (0.53, 1.55) (0.32, 1.02) (0.71, 2.04)  
OR§ 1 0.77 0.85 0.57 1.19 0.83
(95% CI)   (0.45, 1.31) (0.50, 1.47) (0.32, 1.03) (0.69, 2.03)  
  1. A total of 11 cases and 7 controls were excluded because of missing values
  2. * Reference category
  3. Chi-squared test for linear trend with 1 df.
  4. † ORs are adjusted for sex and age.
  5. § ORs are adjusted for sex, age, smoking history, alcohol consumption, education and serum levels of antioxidants