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Table 2 Characteristics of the Subjects

From: Prevalence of the metabolic syndrome among children from six cities of China

  Boys (n = 4,495) Girls (n = 4,269) Total (n = 8,764)  
  Mean ± SD Mean ± SD Mean ± SD p-value
Age (years) 8.7 ± 1.4 8.6 ± 1.4 8.6 ± 1.4 < 0.0001
Anthropometric measures   
   Height (cm) 135.4 ± 9.4 134.6 ± 9.8 135.0 ± 9.6 < 0.0001
   Weight (kg) 32.5 ± 9.6 30.4 ± 8.4 31.5 ± 9.1 < 0.0001
   Waist circumference (cm) 59.3 ± 9.6 56.0 ± 7.7 57.7 ± 8.9 < 0.0001
   BMI (kg/m2) 17.4 ± 3.3 16.5 ± 2.8 17.0 ± 3.1 < 0.0001
Blood pressure   
   Systolic (mmHg) 100.9 ± 10.6 98.8 ± 10.6 99.9 ± 10.7 < 0.0001
   Diastolic (mmHg) 63.6 ± 8.8 63.6 ± 9.2 63.6 ± 9.0 0.8478
Metabolic profile     
   TG (mmol/L) 0.80 ± 0.46 0.83 ± 0.43 0.81 ± 0.45 < 0.0001
   TC (mmol/L) 4.06 ± 0.76 4.11 ± 0.81 4.08 ± 0.78 0.0042
   LDL-C (mmol/L) 2.08 ± 0.62 2.16 ± 0.66 2.12 ± 0.64 < 0.0001
   HDL-C (mmol/L) 1.48 ± 0.31 1.45 ± 0.30 1.46 ± 0.31 < 0.0001
   Glucose (mmol/L) 4.57 ± 0.57 4.45 ± 0.58 4.51 ± 0.58 < 0.0001
BMI status   
   Normal weight (%) 74.1 82.6 78.2 < 0.0001
   Overweight (%) 13.3 9.5 11.5  
   Obesity (%) 12.6 7.9 10.3  
  1. Comparison between boys and girls, using generalized linear mixed model for classified variables and mixed linear model for continuous variable by controlling the different schools and classes.