Table 4

Intensity of the impacts associated with self-perceived malocclusion, by covariables, among 11-12-year-old Peruvian schoolchildren
Covariables
 Intensity of the impacts
 p value



Very little
 Little
 Moderate
 Severe
 Very severe



n
 %
 n
 %
 n
 %
 n
 %
 n
 %
Sex









0.187
     Girls
 14
 19.4
 32
 44.4
 13
 18.1
 9
 12.5
 4
 5.6
     Boys
 22
 41.4
 11
 20.8
 10
 18.9
 8
 15.1
 2
 3.8
Age









0.447
     11 years
 13
 37.2
 10
 28.6
 6
 17.1
 4
 11.4
 2
 5.7
     12 years
 23
 25.6
 33
 36.7
 17
 18.9
 13
 14.4
 4
 4.4
Education level









0.029
     Primary school
 23
 36.6
 22
 34.9
 9
 14.2
 7
 11.1
 2
 3.2
     High school
 13
 21.0
 21
 33.8
 14
 22.6
 10
 16.1
 4
 6.5

Mann- Whitney test was used

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