Table 3. Operative characteristics of waist circumference for obstructive sleep apnea screening compared to polysomnography.

x				Operative characteristics for optimal cut-off point found in the study
	Sensitivity (%) 95%CI	Specificity (%) 95%CI	AUC	Cut-off point cm	Sensitivity (%) 95%CI	Specificity (%) 95%CI	AUC
Women general	82.6 (76–87.9)	42.1 (35.7–48.7)	0.62 (0.58–0.66)	97.5	65.3 (57.7–72.4)	68.5 (62.2–74.4)	0.67 (0.62–0.71)
Men general	83.7 (78.4–88.1)	23.8 (19.2–28.9)	0.54 (0.50–0.57)	99.5	53.1 (46.6–59.4)	58.0 (52.2–63.4)	0.55 (0.51–0.59)
Women
< 60	81.3 (71–89.1)	45.8 (37.5–54.3)	0.63 (0.57–0.69)	94	65.0 (53.5–75.3)	64.0 (55.5–71.7)	0.64 (0.57–0.71)
> 60	83.7 (74.5–90.6)	36.3 (26.4–47)	0.60 (0.53–0.66)	97.5	73.1 (62.9–81.8)	59.3 (48.5–69.5)	0.66 (0.59–0.73)
Men
< 60	85.2 (78.3–90.6)	27.8 (20.6–35.8)	0.56 (0.51–0.61)	98.5	58.0 (49.4–65.9)	60.0 (51.6–67.7)	0.59 (0.53–0.64)
> 60	81.6 (72.7–88.5)	20.4 (14.5–27.3)	0.51 (0.64–0.55)	99.5	52.4 (42.4–62.4)	55.1 (47.2–62.8)	0.53 (0.47–0.59)

AUC = area under the curve; CI = confidence interval.