Dentoskeletal and soft tissue changes in class II subdivision treatment with asymmetric extraction protocols

Progress in Orthodontics

Table 2 Intergroup baseline comparability (t and Chi-square tests)

	Group 1—3 extractions (n = 31)		Group 2—1 extraction (n = 32)
Variables	Mean	S.D.	Mean	S.D.	P
Initial age	13.58	2.26	13.98	1.66	0.425^a
Final age	16.83	2.39	16.90	1.85	0.888^a
Treatment time	3.25	1.02	2.92	1.02	0.210^a
Sex
Male	13		12
Female	18		20		0.719^b
Maxillary Little Irregularity Index	5.33	4.02	4.22	2.74	0.202^a
Mandibular Little Irregularity Index	2.52	1.52	2.43	1.74	0.824^a