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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.