Table 4. Cut-off values for neck circumference, waist circumference, body mass index as predictor of OSA in male and female.

	Neck circumference		Waist circumference		Body mass index
	Male	Female	Male	Female	Male	Female
Area under the ROC curve (95% CI)	0.73 (0.65–0.81)	0.74 (0.65–0.84)	0.80 (0.71–0.88)	0.73 (0.63–0.83)	0.79 (0.71–0.87)	0.73 (0.63–0.83)
Cut-off value	38.75 cm	34.5 cm	88.5 cm	76.5 cm	24.95 kg/m2	23.05 kg/m2
Sensitivity	60%	50%	81%	88%	70%	72%
Specificity	79%	89%	64%	54%	79%	68%

OSA, Obstructive sleep apnea; ROC, receiver operating characteristics; CI, confidence interval.