Table1 Basic characteristics of children and adolescents aged 7–18 years in Hainan Province, China, 2014

Age (year, mean, SD)

13.25

3.06

13.84

3.37

13.59

3.25

 < 0.001

Age groups (n, %)

 7–8

43

6.46

67

7.35

110

6.98

 < 0.001

 9–10

146

21.92

181

19.87

327

20.74

 11–12

159

23.87

154

16.90

313

19.85

 13–14

118

17.72

103

11.31

221

14.01

 15–16

89

13.36

178

19.54

267

16.93

 17–18

111

16.67

228

25.03

339

21.50

 Urban (n, %)

379

56.91

559

61.36

938

59.48

0.075

 Rural (n, %)

287

43.09

352

38.64

639

40.52

 Height (cm)

150.42

15.69

148.05

12.11

149.05

13.78

0.001

 Weight (kg)

39.61

12.48

38.16

9.94

38.77

11.10

0.013

 BMI (kg/m², mean, SD)

17.02

2.68

17.06

2.52

17.04

2.58

0.718

 Uric acid (μmol/L, median, IQR)

348.15

129.20

294.70

83.70

314.00

104.80

 < 0.001

 SBP (mmHg, mean, SD)

108.56

12.51

104.53

10.49

106.23

11.56

 < 0.001

 DBP (mmHg, mean, SD)

65.50

8.52

66.84

8.23

66.27

8.37

0.001

 TC (mmol/L, median, IQR)

3.98

0.95

4.17

0.94

4.09

0.92

 < 0.001

 TG (mmol/L, median, IQR)

0.63

0.32

0.71

0.32

0.68

0.34

 < 0.001

 LDL-C (mmol/L, median, IQR)

2.24

0.77

2.38

0.82

2.33

0.81

 < 0.001

 HDL-C (mmol/L, median, IQR)

1.42

0.42

1.46

0.39

1.44

0.39

0.043

 Creatinine (μmol/L, median, IQR)

58.00

26.80

52.80

15.30

54.50

16.90

 < 0.001