Table 2. Characteristics between experimental and validation groups.

Characteristics	Experimental group	Validation group	P value
Sex	(Male) 77.7%	(Male) 83.2%	0.27
Age	39.5 (31.8, 48.3)	43 (33.0, 52.0)	0.51
BMI	26.9 (24.5, 29.4)	26.5 (24.3, 29.2)	0.28
Neck circumference	40 (37.9, 42.3)	40.8 (38.1, 42.5)	0.84
AHI	26.6 (9.6, 54.8)	23 (8.5, 47.3)	0.16
ESS	8 (5.8, 13.0)	8 (5.0, 12.0)	0.87

Data are expressed as median (interquartile range) or percentage (%). ESS, Epworth Sleepiness Scale; BMI, body mass index; AHI, apnea-hypopnea index.