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Table 3 Comparison of the proportions of the two samples estimated to need orthodontic treatment (DHC)

From: Orthodontic treatment needs in the western region of Saudi Arabia: a research report

Group/Grade

KAAU

PDP

Chi-Square

P-value

 

%

N

%

N

  

Little/No TX. (Gr.I&II)

18.2

89

9.4

24

37.389

0.000*

Border line (Gr.III)

11.8

58

15.7

40

3.306

0.069

Need TX. (Gr.IV&V)

70

342

74.9

190

34.429

0.000*

Total

 

489

 

254

  
  1. * Significant at p < 0.001
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Head & Face Medicine

ISSN: 1746-160X

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