From: Assessing changes in quality of life using the Oral Health Impact Profile (OHIP) in patients with different classifications of malocclusion during comprehensive orthodontic treatment
Clinical stage
Class I group
Class II group
Class III group
P*
Mean(SD)
T0-T1
7.11(1.71)
8.13(0.25)
7(1.05)
P > 0.05 (NS)
T1-T2
9.05(1.2)
9.11(0.95)
8.04(1.35)
T2-T3
5.22(0.58)
5.43(0.77)
5.31(1.27)