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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