Proposal for a screening questionnaire for detecting habitual mouth breathing, based on a mouth-breathing habit score

Table 4 Odds ratio analysis of oral examination items (Part 2)

	Applicability (%)		Odds ratio
	Nose breathing group	Mouth breathing group (includes suspected mouth breathing group)	Odds ratio
Discomfort while breathing with the lips closed	1.1	36.4	49.71^a
Open mouth at rest	4.5	63.6	36.75^a
Increased chin muscle tonus	3.4	19.7	6.95^a
Tongue thrust during swallowing	9.7	42.4	6.89^a
Maxillary protrusion	8.0	22.7	3.40^a
Open bite	4.5	12.1	2.90^a
History of asthma	7.4	16.7	2.51^a
Mandibular protrusion	6.8	15.2	2.44
Edge-to-edge bite	1.7	3.0	1.80
Other malocclusion (crowding, cross bite)	17.6	27.3	1.50
Excessive overbite	2.3	0	0.00

ISSN: 1472-6831