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Table 1 Prevalence of trauma to permanent teeth according to the variables analyzed in 12-year-old schoolchildren at the city of Brasília- DF- Brazil, in the year 2012

From: Socio-economic indicators and predisposing factors associated with traumatic dental injuries in schoolchildren at Brasília, Brazil: a cross-sectional, population-based study

Variables Frequency (n = 1118) Prevalence of trauma to permanent teeth (%) *CI 95%
School    
Public 588 14.63 11.76 – 17.49
Private 530 23.40 19.79 – 27.01
Lip coverage    
Adequate 989 13.65 11.51 – 15.79
Inadequate 129 58.14 49.61 – 66.67
Overjet    
Anterior maxilla 1064 18.89 16.53 – 21.25
Anterior mandible 11 27.27 0.91 – 53.63
Open bite 43 13.95 3.58 – 24.33
Sex    
Male 536 21.27 17.80 – 24.74
Female 582 16.49 13.47 – 19.51
Educational level    
Fundamental 210 12.86 8.32 – 17.39
High school 306 18.30 13.96 – 22.64
Graduation 494 20.44 16.88 – 24.01
Postgraduate 108 24.07 16.00 – 32.15
Income (real)    
Up to 250 13 15.38 0.00 – 35.03
251 – 500 67 11.94 4.16 – 19.72
501 – 1500 291 18.21 13.77 – 22.65
1501 – 2500 141 17.73 11.42 – 24.04
2501 – 4500 143 16.09 10.05 – 22.11
4501 – 9500 206 21.36 15.75 – 26.96
> 9500 257 21.40 16.38 – 26.42
  1. *CI- Confidence Interval.