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Table 1 Demographic characteristics of the NHANES 2005–2010 participants (N = 2372), aged 6–19 years

From: Using three statistical methods to analyze the association between exposure to 9 compounds and obesity in children and adolescents: NHANES 2005-2010

Characteristics Obesity 487 (20.53%) No obesity 1885 (79.47%) P value
Age (y), mean (SD) 12.57 (3.81) 12.51 (4.01) 0.729
Gender    0.931
 Male 252 (10.62%) 982 (41.40%)  
 Female 235 (9.91%) 903 (38.07%)  
Race    < 0.001
 Mexican American 143 (6.03%) 516 (21.75%)  
 Other Hispanic 52 (2.19%) 152 (6.41%)  
 Non-Hispanic White 112 (4.72%) 615 (25.93%)  
 Non-Hispanic Black 157 (6.62%) 491 (20.70%)  
 Other Race 23 (0.97%) 111 (4.68%)  
Education level    0.155
 ≤5 grade 215 (9.06%) 852 (35.92%)  
 6–8 grade 118 (4.97%) 409 (17.24%)  
 9–12 grade, No Diploma 115 (4.85%) 453 (19.10%)  
 High School Graduate 26 (1.10%) 79 (3.33%)  
 GED or Equivalent, More than high school 13 (0.55%) 92 (3.88%)  
Family income-to-poverty ratio    0.003
 ≤ 1.30 235 (9.91%) 774 (32.63%)  
 1.31,3.50 177 (7.46%) 706 (29.76%)  
 > 3.50 75 (3.16%) 405 (17.07%)  
Caloric intake    0.014
 Normal intake 283 (11.93%) 975 (41.10%)  
 Excessive intake 204 (8.60%) 910 (38.36%)  
Serum cotinine (ng/mL), GM (SD) 0.13 (10.55) 0.13 (14.48) 0.140*
Urinary creatinine (mg/dL), GM (SD) 119.89 (1.88) 107.53 (2.01) 0.005*
BMI, mean (SD) 30.41 (6.99) 19.68 (3.66) < 0.001
BMI z-score, mean (SD) 2.12 (0.32) 0.18 (0.94) < 0.001
Waist Circumference (cm), mean (SD) 96.17 (18.05) 69.79 (11.36) < 0.001
  1. NHANES: National Health and Nutrition Examination Survey; BMI: body mass index. Data are presented as mean ± SD or Geometric mean ± SD or n (%). The t-test and χ2 test were between the general obesity and no obesity groups. *Wilcoxon rank-sum test was used for the non-normal distribution data