Dentofacial characteristics of oral breathers in different ages: a retrospective case–control study

Progress in Orthodontics

Table 3 Intra-group association tests (Pearson’s x², odds ratio) of qualitative variables for the group n3 (13 to 18 years of age)

Variables	OBl(n)	OBl % NB (n)	NB %	Total	Pearson X	p-value DF	Lilihood x	p-value	DF OD	IC 95 %	DF	OR	IC 95 %
F	91	54	104	56		0.072	0.788	1	0.072	0.7888	1
M	76	46	82	44		0.072	0.788	1	0.072	0.7888	1
Total	167		186		353
I	52	39	85	50
II	73	54	69	40		5.102	0.024*	1	5.121	0.024*	1	1.73	(1.07; 2.78)
III	10	7	17	10		0.008	0.928	1	0.008	0.928	1
Total	135		171		306
NMx	21	13	15	8
PMx	113	69	127	70		1.586	0.208	1	1.59	0.207	1
RMx	29	18	40	22		2.521	0.112	1	2.528	0.112	1
Total	163		182		345
NM	17	10	23	13
PM	83	51	103	56		0.06	0.806	1	0.06	0.806	1
RM	64	39	57	31		1.299	0.254	1	1.302	0.254	1
Total	164		183		347
NM	45	28	63	35
IM	60	37	73	41		0.288	0.592	1	0.288	0.591	1
SM	56	35	42	24		4.924	0.026*	1	4.943	0.026*	1	1.87	(1.07; 3.24)
Total	161		178		339
NLAFH	27	17	47	27
ILAFH	109	68	103	58		4.902	0.027*	1	4.957	0.026*	1	1.84	(1.07; 3.17)
DLAFH	25	15	26	15
Total	161		176		337
NP	29	18	35	19
BP	42	26	55	31		0.063	0.801	1	0.063	0.801	1
DP	90	56	89	50		0.465	0.495	1	0.466	0.495	1
Total	161		179