TABLE 3.

Differences in clinical predictive features for severe obstructive sleep apnea among younger adults and older adults in the decision tree model and their accuracy.

Younger adults a (n = 1804)		Older adults b (n = 116)
Risk factors	Cutoffs	Risk factors	Cutoffs
Average SBP, mmHg	<135, ≥135	Average SBP, mmHg	<134, ≥134
BMI, kg/m2	<42, ≥42	DBP (morning), mmHg	≥86, <86
Mean SpO2, %	<96, ≥96	Waist circumference	<99, ≥99
		Gender	Male, Female
Model AUC	0.723	Model AUC	0.807

Abbreviations: AUC, area under the receiver operating characteristic curve; BMI, body mass index; DBP, diastolic blood pressure; SBP, systolic blood pressure; SpO₂, pulse oximetry.

^a Younger adults: age <65 years.

^b Older adults: age ≥65 years.