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Table 1—

Baseline characteristics of Danish 9- to 10-year-old children in the European Youth Heart Study

VariableAllBoysGirls
n 589 279 310 
Age (years) 9.6 ± 0.4 9.7 ± 0.4 9.6 ± 0.4 
Ethnicity (Caucasian/other) 543/40 258/19 285/21 
Weight (kg) 33.6 ± 6.4 34.0 ± 6.4 33.2 ± 6.3 
Height (m) 1.39 ± 0.06 1.39 ± 0.06 1.38 ± 0.06 
Tanner stage (1/2/3) 490/85/5 275/0/0 215/85/5* 
Sum of four skinfolds (mm) 36.8 ± 18 34.1 ± 17 39.2 ± 19* 
Insulin (pmol/l) 55.8 ± 33 52.5 ± 36 58.8 ± 29* 
Glucose (mmol/l) 5.12 ± 0.4 5.18 ± 0.4 5.06 ± 0.4* 
Triglycerides (mmol/l) 0.84 ± 0.3 0.80 ± 0.3 0.89 ± 0.3* 
HDL cholesterol (mmol/l) 1.48 ± 0.3 1.52 ± 0.3 1.45 ± 0.3* 
Systolic BP (mmHg) 104.9 ± 7.5 105.8 ± 7.6 104.2 ± 7.4* 
Diastolic BP (mmHg) 62.9 ± 5.6 63.1 ± 5.7 62.7 ± 5.4 
Metabolic syndrome (Z score) 0 ± 0.5 −0.07 ± 0.5 0.07 ± 0.5* 
Parental smoking (yes/no) 341/231 159/118 182/113 
Socioeconomic group    
    Mother 2.6 ± 0.9 2.6 ± 0.9 2.6 ± 0.9 
    Father 3.1 ± 1.0 3.0 ± 1.0 3.1 ± 1.0 
Physical fitness (W/kg) 2.99 ± 0.6 3.18 ± 0.6 2.82 ± 0.5* 
Physical activity (cpm) 660 ± 233 728 ± 239 600 ± 211* 
VariableAllBoysGirls
n 589 279 310 
Age (years) 9.6 ± 0.4 9.7 ± 0.4 9.6 ± 0.4 
Ethnicity (Caucasian/other) 543/40 258/19 285/21 
Weight (kg) 33.6 ± 6.4 34.0 ± 6.4 33.2 ± 6.3 
Height (m) 1.39 ± 0.06 1.39 ± 0.06 1.38 ± 0.06 
Tanner stage (1/2/3) 490/85/5 275/0/0 215/85/5* 
Sum of four skinfolds (mm) 36.8 ± 18 34.1 ± 17 39.2 ± 19* 
Insulin (pmol/l) 55.8 ± 33 52.5 ± 36 58.8 ± 29* 
Glucose (mmol/l) 5.12 ± 0.4 5.18 ± 0.4 5.06 ± 0.4* 
Triglycerides (mmol/l) 0.84 ± 0.3 0.80 ± 0.3 0.89 ± 0.3* 
HDL cholesterol (mmol/l) 1.48 ± 0.3 1.52 ± 0.3 1.45 ± 0.3* 
Systolic BP (mmHg) 104.9 ± 7.5 105.8 ± 7.6 104.2 ± 7.4* 
Diastolic BP (mmHg) 62.9 ± 5.6 63.1 ± 5.7 62.7 ± 5.4 
Metabolic syndrome (Z score) 0 ± 0.5 −0.07 ± 0.5 0.07 ± 0.5* 
Parental smoking (yes/no) 341/231 159/118 182/113 
Socioeconomic group    
    Mother 2.6 ± 0.9 2.6 ± 0.9 2.6 ± 0.9 
    Father 3.1 ± 1.0 3.0 ± 1.0 3.1 ± 1.0 
Physical fitness (W/kg) 2.99 ± 0.6 3.18 ± 0.6 2.82 ± 0.5* 
Physical activity (cpm) 660 ± 233 728 ± 239 600 ± 211* 

Data are means ± SD.

*

P < 0.05 for sex difference.

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