[Statistical evaluation of the "measure of concordance" between Angle classifications and the ANB angle]

In a sample of 177 subjects 6 to 15 years of age, with various types and degrees of malocclusions, the A.A. measured, with statistical methods, the agreement between Angle and Ballard classifications. The result was a disagreement between the two classifications for Class I and Class II malocclusion and some agreement between the two classifications for Class III malocclusion. The applied discriminant function was not able to classify observations in a better way.