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Table 1 Baseline characteristics of the BCAMS study population (mean ± SD)

From: The common rs9939609 variant of the fat mass and obesity-associated gene is associated with obesity risk in children and adolescents of Beijing, China

  All Obese Non-obese p-valuea
n 3503 1229 2274  
Boys (%) 1781 (50.8) 786 (64.0) 995 (43.8) < 0.001
Age (years) 12.4 ± 3.1 11.8 ± 2.9 12.7 ± 3.1 < 0.001
Height (cm) 152.3 ± 15.3 152.8 ± 14.6 152.1 ± 15.7 0.18
Weight (kg) 52.4 ± 18.6 63.6 ± 18.9 46.3 ± 15.4 < 0.001
Body mass index (kg/m2) 21.9 ± 4.9 26.5 ± 3.7 19.4 ± 3.5 < 0.001
Body mass index-standard deviation score 1.21 ± 1.50 2.79 ± 1.01 0.35 ± 0.91 < 0.001
Waist circumference (cm) 72.4 ± 13.1 83.7 ± 10.9 66.3 ± 9.7 < 0.001
Waist-to-Height Ratio 0.47 ± 0.07 0.55 ± 0.05 0.44 ± 0.04 < 0.001
Fat mass percentage (%) 24.4 ± 8.5 30.9 ± 6.7 20.9 ± 7.3 < 0.001
Birth weight (g) 3355 ± 525 3423 ± 516 3317 ± 526 < 0.001
Systolic blood pressure (mmHg) 107.6 ± 13.9 114.3 ± 12.7 104.0 ± 13.2 < 0.001
Diastolic blood pressure (mmHg) 67.8 ± 10.0 71.9 ± 9.2 65.5 ± 9.8 < 0.001
Total cholesterol (mmol l-1) 4.09 ± 0.82 4.09 ± 0.74 4.10 ± 0.87 0.76
Triglycerides (mmol l-1) 1.03 ± 0.56 1.20 ± 0.63 0.94 ± 0.50 < 0.001
HDL-cholesterol (mmol l-1) 1.40 ± 0.32 1.27 ± 0.26 1.47 ± 0.33 < 0.001
LDL-cholesterol (mmol l-1) 2.55 ± 0.75 2.63 ± 0.66 2.51 ± 0.80 < 0.001
Fasting plasma glucose (mmol l-1) 5.09 ± 0.62 5.16 ± 0.48 5.06 ± 0.68 < 0.001
Regular physical activity habitb 56.3 53.1 58.0 < 0.001
  1. a Quantitative variables between obese and non-obese groups were assessed with a Student's t-test; categorical variables between groups were tested by a χ2 test.
  2. b Regular physical activity was defined as participation in sports for at least 30 minutes per day and ≥ 3 days per week.