Table 1

Comparison of demographic characteristics between LBCa and non-LBC

Total

(N = 2986)

Non-LBC

(N = 2445)

LBC

(N = 541)

p-value

2 test)


Gender (%)

0.075


Male

51.4

50.7

54.9


Female

48.6

49.3

45.1


Age (year), Mean (SD)

14.2 (1.4)

14.3 (1.5)

13.7 (1.2)

< 0.001b


Ethnicity (%)

0.030


Han

99.4

99.5

98.7


Others

0.6

0.5

1.3


Grade (%)

< 0.001


Year 1 of junior secondary school

57.8

54.2

74.3


Year 2 of junior secondary school

19.5

20.3

15.7


Year 1 of senior secondary school

22.7

25.5

10.0


Boarder in this term (%)

< 0.001


Yes

12.5

13.7

6.6


No

87.5

86.3

93.4


Father's education (%)

0.786


Primary school and below

24.7

24.5

25.9


Junior secondary school

53.0

53.2

52.0


Senior secondary school and above

22.3

22.3

22.1


Father's occupation (%)

0.008


Farmer

31.9

33

26.5


Non-farmer

68.1

67

73.5


Mother's education (%)

0.005


Primary school and below

56.1

57.2

51.0


Junior secondary school

34.1

33.7

35.9


Senior secondary school and above

9.8

9.1

13.2


Mother's occupation (%)

< 0.001


Farmer

47.6

50.2

35.4


Non-farmer

52.4

49.8

64.6


Living with grandparents (%)

0.608


Yes

25.9

25.7

26.8


No

74.1

74.3

73.2


House type (%)

0.352


Single-storey house

47.0

49.3

47.4


Multi-storey house

53.0

50.7

52.6


Having computer at home (%)

0.061


No

68.2

67.4

72.0


Yes, but not connected with internet

12.9

13.0

12.7


Yes, already connected with internet

18.8

19.6

15.3


a: LBC: Left Behind Children;

b: t-test;

Totals for all categories may not sum to 2986 due to missing data.

Gao et al. BMC Public Health 2010 10:56   doi:10.1186/1471-2458-10-56

Open Data