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Table 1 Demographic characteristics of the study population

From: Evaluation of the relative validity of a Web-based food frequency questionnaire used to assess Soy Isoflavones and nutrient intake in adolescents

Demographic Characteristic Total Group (TeenFADS) (N = 601) webFFQ Validation Sub-Study Group (n = 55) p-value
Age in years, mean (SD) 15.0 (1.8) 15.3 (1.7) 0.17
Gender    0.57
 Males, % 44 40  
 Females, % 56 60  
Ethnicity    0.57
 Caucasian, % 34 46  
 African/Afr-Am, % 9 6  
 Hispanic, % 14 16  
 Asians, % 11 7  
 Others, % 7 7  
 Mixed, % 18 18  
Site    0.66
 California, % 55 58  
 Michigan, % 45 42  
Vegetarian, % 24 42 0.002
BMI z-scores, mean (SD) 0.35 (0.95) 0.49 (1.03) 0.24