Table 1.

Descriptive Statistics of the Study Population for Maxillary and Mandibular Dental Arches*

Group	Females (n)	Males (n)	Age, y (Mean ± SD)	Mean Treatment Duration, y (Mean ± SD)
Maxillary dental arch
Protrusion	18	12	15.78 ± 2.35	2.82 ± 0.47
Retrusion	23	7	16.13 ± 2.49	3.18 ± 0.49
Total	41	19	15.96 ± 2.41	3.00 ± 0.51
P			.704	.626
Mandibular dental arch
Protrusion	16	14	16.00 ± 2.90	2.89 ± 0.50
Retrusion	24	6	17.37 ± 3.45	3.16 ± 0.57
Total	40	20	16.65 ± 3.23	3.02 ± 0.55
P			.086	.647

^*P < .05.