Table 5

Extent of the impacts associated with self-perceived malocclusion, by covariables, among 11-12-year-old Peruvian schoolchildren

Covariables

n

Performances with impacts

p value

Mean

S.D.

Range

Quartiles

Sex

0.725

Girls

72

1.32

0.71

1 – 5

(1, 1, 1)

Boys

53

1.28

0.50

1 – 3

(1, 1, 2)

Age

0.883

11 years

35

1.29

0.57

1 – 3

(1, 1, 1)

12 years

90

1.31

0.65

1 – 5

(1, 1, 1.25)

Education level

0.344

Primary school

63

1.24

0.50

1 – 3

(1, 1, 1)

High school

62

1.37

0.73

1 – 5

(1, 1, 2)

Mann- Whitney test was used

Bernabé et al. BMC Oral Health 2007 7:6   doi:10.1186/1472-6831-7-6