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Table 2 Descriptive statistics of individual level variables among children aged 5–18 years from the China Health and Nutrition Surveys, 2011

From: The association between urbanization and child height: a multilevel study in China

Variable

N

Percentage (%) or x ± s

gender

 Male

827

51.49

 Female

779

48.51

Age (year)

1606

11.14 ± 3.71

Ethnicity

 Miao

48

2.99

 Buyi

52

3.24

 Tujia

37

2.30

 Han

1469

91.47

Family income per capita

 1st Quintile

336

20.92

 2nd Quintile

310

19.30

 3rd Quintile

320

19.93

 4th Quintile

312

19.43

 5th Quintile

328

20.42

Maternal education level

 low education

573

35.68

 middle education

829

51.62

 high education

204

12.7

 Maternal height

1289

 

Percentage of energy take from protein (%)

1606

0.14 ± 0.03

Urbanization Index

 

157.71 ± 6.10

1st quintile

314

19.55

2nd quintile

319

19.86

3rd quintile

318

19.80

4th quintile

342

21.30

5th quintile

313

19.49

Z score of height for age

1606

−0.19 ± 1.24

< −2

111

6.91

−2~

265

16.50

−1~

514

32.00

0~

479

29.83

1~

188

11.71

> 2

49

3.05