Table 1

Comparison of demographics and socioeconomic status between cases and controls

Cases n(%)

Controls n(%)

P-value (χ2 test)


Age(years)

325(100.0)

325(100.0)

0.545

9-11

35(10.7)

38(11.7)

12

54(16.6)

58(17.8)

13

48(14.8)

32(9.8)

14

83(25.5)

97(29.8)

15

75(23.1)

71(21.8)

16-18

30(9.2)

29(8.9)

Father's education

325(100.0)

325(100.0)

0.605

Illiteracy

4(1.2)

4(1.2)

Elementary school

39(12.0)

51(15.7)

High school

140(43.1)

148(45.5)

Undergraduate

54(16.6)

51(15.7)

Postgraduate and over

21(6.5)

14(4.3)

Unknown

67(20.6)

57(17.5)

Mother's education

252(100.0)

255(100.0)

0.558

Illiteracy

9(2.8)

6(1.9)

Elementary school

88(27.1)

92(28.4)

High school

101(31.1)

109(33.6)

Undergraduate

39(12.0)

40(12.4)

Postgraduate and over

15(4.6)

8(2.5)

Unknown

73(22.5)

69(21.3)

Household income

325(100.0)

325(100.0)

0.344

Low

33(10.2)

23(7.1)

In-betweens

228(70.2)

223(68.8)

High

52(16.0)

65(20.1)

Unknown

12(3.7)

13(4.0)


Ma et al. BMC Public Health 2010 10:156   doi:10.1186/1471-2458-10-156

Open Data