Table 2.

Pattern matrix of the factor analysis

Item no.	Question item	Factor 1	Factor 2	Factor 3	Factor 4
(Q‐6)	Does your nose become stuffed easily during the day?	1.044	−0.147	−0.017	0.077
(Q‐7)	Does your nose become stuffed easily while sleeping?	0.491	0.365	−0.006	−0.147
(Q‐18)	Is your mouth often open during the day?	0.022	0.614	0.047	−0.006
(Q‐29)	Are your lips droopy?	−0.101	0.522	−0.196	0.052
(Q‐19)	Do you sleep with your mouth open?	0.019	0.470	0.177	0.114
(Q‐43)	Do you keep your mouth closed when you eat?	0.042	0.049	−0.738	−0.001
(Q‐42)	Are you a noisy eater?	0.013	0.001	0.605	−0.017
(Q‐40)	Are you a picky eater?	−0.027	0.014	−0.003	0.634
(Q‐37)	Do you prefer soft food?	0.066	0.098	−0.015	0.474