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Table 1 Characteristics of participants by categories of dietary total antioxidant capacity at baseline: Tehran Lipid and Glucose Study¹

From: Dietary total antioxidant capacity and the occurrence of metabolic syndrome and its components after a 3-year follow-up in adults: Tehran Lipid and Glucose Study

  ( n  = 1938)
 Q1   Q2   Q3   Q4  P2
Total antioxidant capacity      
Range < 842 842-958 959-1080 > 1080  
Median 764 906 1014 1161  
Age at baseline (yr) 37.0 ± 0.6 40.2 ± 0.5 41.4 ± 0.5 43.0 ± 0.5 <0.001
Men (%) 53.9 46.8 39.0 34.5 <0.001
Physical activity (Met-h/week)      
Job activity 29.2 ± 2.3 26.7 ± 2.3 22.5 ± 2.3 26.0 ± 2.3 0.25
Leisure time activity 8.2 ± 0.7 9.9 ± 0.7 10.2 ± 0.7 12.0 ± 0.7 0.005
Total 37.5 ± 2.5 36.6 ± 2.4 32.7 ± 2.4 38.1 ± 2.4 0.41
Current smoker (%) 13.7 11.0 10.8 9.2 0.16
Education status (%)      
Illiterate 2.5 1.7 2.3 2.7 0.73
Primary education 7.5 3.2 6.5 0 0.81
Academic education 81.1 90.3 83.9 91.3 0.81
Advanced academic education 11.3 6.5 9.7 8.7 0.81
  1. 1Data are age- and sex-adjusted mean ± SEM.
  2. 2P for trend across quartiles of dietary phytochemical index was calculated using Chi square test or linear regression models with adjustment for sex and age.