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Table 3 Crude logistic univariate relationships of cognitive impairment with predictors and final covariates

From: Effect of sunlight exposure on cognitive function among depressed and non-depressed participants: a REGARDS cross-sectional study

Characteristics OR (95% CI)
Primary Variable of Interest  
Same day solar radiation
(by 5,000 KJ/m2/day)
 
   <10,000 J/m2 1.15 (0.96–1.38)
   10,000–15,000 J/m2 1.02 (0.86–1.21)
   15,000–20,000 J/m2 0.96 (0.82–1.13)
   20,000–25,000 J/m2 1.03 (0.88–1.21)
   >25,000 J/m2 1.00 (Referent)
  CMH chisq p = 0.4346
2 week solar radiation
(by 5,000 KJ/m2/day)
 
   <10,000 J/m2 1.36 (1.08–1.70)
   10,000–15,000 J/m2 1.13 (0.95–1.33)
   15,000–20,000 J/m2 1.09 (0.92–1.30)
   20,000–25,000 J/m2 1.01 (0.86–1.19)
   >25,000 J/m2 1.00 (Referent)
  CMH chisq p = 0.0075
Covariates  
   Male 1.29 (1.15–1.44)
   Education  
Less than High School 4.56 (3.57–5.83)
High School 3.26 (2.55–4.17)
Some College 1.91 (1.49–2.46)
College Diploma 1.00 (Referent)
  CMH chisq p < .0001
   Income  
Less than $20,000 per year 4.47 (3.46–5.77)
$20,000 to $35,000 per year 3.21 (2.49–4.15)
$35,000 to $75,000 per year 1.88 (1.45–2.45)
$75,0000 or more per year 1.00 (Referent)
  CMH chisq p < .0001
   Age  
Less than 55 years 1.00 (Referent)
55 to 59 years 1.15 (0.89–1.50)
60 to 64 years 1.30 (1.01–1.68)
65 to 69 years 1.80 (1.41–2.29)
70 to 74 years 2.36 (1.85–3.02)
75 to 79 years 3.11 (2.43–3.99)
80 or more years 4.25 (3.30–5.46)
  CMH chisq p < .0001
   Region  
Non Belt/Buckle 1.00 (Referent)
Stroke Belt 1.07 (0.95–1.21)
Stoke Buckle 0.91 (0.77–1.06)
   Season  
Summer 1.00 (Referent)
Fall 0.98 (0.83–1.16)
Winter 1.64 (1.42–1.90)
Spring 1.46 (1.26–1.69)
   Depressed 1.90 (1.65–2.20)
   PCS-12 (by 10 unit increase) 0.82 (0.78–0.86)
   Never Used Alcohol 1.44 (1.28–1.61)
  1. OR = odds ratio; CI = confidence interval; PCS = Physical Components Summary
  2. CMH chisq = Cohran-Mantel-Haenzel chi-squared
  3. ORs in bold have CI's which do not overlap a null value