Table 2

Demographic characteristics of study participants by study groups

Adolescents of migrant workers

(N = 252)

Adolescents of general residents

(N = 2569)

t/χ2


Age (years, mean ± SD)

14.17 (1.03)

13.99 (0.92)

3.28** a

Gender (%)

1.97b

Males

50.3

48.0

Females

45.8

52.0

Family income (%) #

181.59** c

Low (<1000)

45.5

20.1

Medium (1000–2499)

50.1

34.0

High (≥ 2500)

14.5

45.9

Family structure

3.23* c

Single parent family

18.5

9.3

Nuclear family

45.5

50.0

Large family

35.9

40.7

Father's education level (%)

305.89** c

Illiterate/primary

8.9

1.2

Middle school

45.0

15.4

High school

38.3

42.8

College and above

7.8

40.6

Mother's education level (%)

420.16** c

Illiterate/primary

20.2

2.5

Middle school

48.6

20.1

High school

26.2

41.6

College and above

5.0

35.7


#Family income was expressed in RMB(yuan)/person/month

a Independent-samples t test

b 2*2 Chi-square Test

c K*2 Chi-square Test

* P < 0.05

** P < 0.01

Li et al. BMC Public Health 2009 9:195   doi:10.1186/1471-2458-9-195

Open Data