Table 4. Operative characteristics of body mass index for obstructive sleep apnea screening compared to polysomnography.

Operative characteristics for BMI ≥ 30				Operative characteristics for the optimal cut-off point
	Sensitivity (%) 95%CI	Specificity (%) 95%CI	AUC	Cut-off point	Sensitivity (%) 95%CI	Specificity (%) 95%CI	AUC
Women general	31.2 (24.4–38.7)	84.3 (79–88.7)	0.58 (0.53–0.62)	26	70.5 (63.1–77.2)	56.6 (50–63)	0.64 (0.58–0.68)
Men general	23.3 (18.1–29.1)	85.2 (80.8–89)	0.54 (0.51–0.57)	26.6	60.0 (53.6–66.2)	59.0 (53.1–64.4)	0.60 (0.55–0.63)
Women
< 60	35.0 (24.7–46.5)	81.9 (74.7–87.9)	0.58 (0.52–0.64)	25	81.3 (71–89.1)	53.5 (45–61.8)	0.67 (061–0.73)
> 60	28.0 (19.1–38.2)	87.9 (79.4–93.8)	0.57 (0.52–0.63)	27.5	57.5 (46.4–68)	70.1 (59.4–79.5)	0.64 (0.56–0.71)
Men
< 60	23.9 (17.2–31.8)	84.0 (77–89.6)	0.49 (0.54–0.58)	26.5	60.5 (52.2–68.5)	60.0 (51.6–67.7)	0.60 (0.54–0.69)
> 60	22.3 (14.7–31.6)	86.2 (80.1–91.1)	0.54 (0.49–0.59)	26.6	61.2 (50.8–70.9)	57.2 (49.2–65)	0.60 (0.53–0.65)

BMI = body mass index; AUC = area under the curve; CI = confidence interval.