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Table 2 Comparison of the DHC grades by sex, socio-economic status and age of the students

From: Normative and self-perceived orthodontic treatment need of a Peruvian university population

Covariables Definite need Borderline need No need P value
  n % n % n %  
Sex        0.403
   Female 34 27.4 41 33.1 49 39.5  
   Male 50 31.8 57 36.3 50 31.8  
Age        0.543
   < 18 years 36 29.0 40 32.3 48 38.7  
   ≥ 18 years 48 30.6 58 36.9 51 32.5  
Socio-economic status        0.247
   Low 50 34.7 42 29.2 52 36.1  
   Medium 29 25.4 47 41.2 38 33.3  
   High 5 21.7 9 39.1 9 39.1  
  1. Chi-square test was used
  2. Degree of freedom = 2 for sex and age, 4 for SES