Table 3: Intergroup compatibility of the initial and final ages and treatment time (independent t test) and maxillary and mandibular little irregularity index (non-parametric Mann Whitney test).

Variables Group 1
Damon
(N=20)
Group 2 Conventional
(N=31)
P
Mean s.d. Mean s.d.
Initial age (y) 15.00 6.41 14.98 3.54 0.989
Final age (y) 17.01 6.66 16.79 3.45 0.876
Treatment time (y) 2.01 0.73 1.81 0.60 0.281
Mx Little (mm) 4.63 3.32 5.47 2.45 0.059
Md Little (mm) 4.86 2.52 4.40 1.91 0.801

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