TABLE 3.

Final multivariate logistic model for changes in self‐perceived breath odour

Variables	Coefficient	OR (95%CI)	p
Constant	−1.398	—	<0.001
Family/friends think you have bad breath	0.397	1.49 (1.29–1.72)	<0.001
Smoking	0.321	1.38 (1.08–1.76)	0.011
Presence of systemic conditions	0.155	1.17 (1.01–1.35)	0.031
Self‐reported dry mouth	0.187	1.21 (1.06–1.37)	0.005
Self‐reported tongue coating	0.194	1.21 (1.06–1.39)	0.004
Period of face mask use
Less than 1 h		(reference)	<0.001
1–2 h/daily	0.218	1.24 (1.06–1.46)	0.008
3–5 h/daily	0.436	1.55 (1.25–1.91)	<0.001
More than 6 h	0.767	2.15 (1.71–2.71)	<0.001
Interaction between prior thinking of having bad breath and period of face mask use and
Less than 1 h		(reference)	<0.001
1–2 h	0.712	2.04 (1.54–2.70)	<0.001
3–5 h	0.816	2.26 (1.40–3.65)	0.001
More than 6 h	0.756	2.13 (1.28–3.54)	0.003

Abbreviation: OR, odds ratio.