Table 3.

The results of decision tree (C=5.0)

The rules to predict the severity of OSA		Probability (%)
AHI ≥15 versus AHI <15	If Mallampati >2, age >51 years, and NC >36 cm, then AHI ≥15	94.16
AHI ≥30 versus AHI <30	If gender: female, BMI >35.8, and age >44 years then AHI ≥30	89.98
	If gender: male, Mallampati ≥2, and AC >112 then AHI ≥30	90.32

NC=Neck circumference; AC=Abdominal circumference; BMI=Body mass index; AHI=Apnea–Hypopnea Index