TABLE 4.

Diagnostic performance of predictive algorithms derived from an online questionnaire at identifying clinically significant obstructive sleep apnea

	Sens	Spec	PPV	NPV
Univariate predictors identified within electronic data
Snoring history (yes/no)	97.5	25.3	52.5	92.2
Stop breathing (yes/no)	74.2	64.0	63.6	74.5
Heart disease (yes/no)	27.6	83.9	59.3	57.7
Choking (yes/no)	50.9	68.6	57.9	62.2
Total sleep time >4 h	98.0	9.04	47.8	84.3
BMI >25 kg/m2	91.5	33.5	53.9	82.3
BMI >30 kg/m2	59.9	67.4	60.9	66.5
Sleep aid use (yes/no)	22.6	52.7	28.8	44.5
Sleep latency >1 h	11.0	74.9	27.1	49.8
Diabetes	7.58	94.8	55.3	54.7
Epworth Sleepiness Scale score >10	61.2	52.5	52.2	61.5
Hypertension	39.5	75.7	57.9	59.6
Combinations of univariate predictors identified within electronic data
Snoring history or witnessed apneas	98.4	23.1	52.1	94.4
Snoring history or choking	98.0	20.7	51.2	92.5
Snoring history or BMI >25 kg/m2	99.6	12.6	49.2	97.6
Choking or BMI >25 kg/m2	94.9	24.3	51.6	85
Heart disease and BMI >30 kg/m2	17.1	92.3	65.5	56.8
Level III sleep diagnostic testing
RDI ≥5/h and <15/h	34.1	63.7	47.1	50.4
RDI ≥15/h and <30/h	28.2	96.3	87.7	58.5
RDI ≥30/h	32.7	94.6	86.0	59.8
Univariate predictors in combination with level III sleep diagnostic testing
Snoring history and RDI >30/h	32.3	95.7	87.7	59.8
BMI >30 kg/m2 and RDI >15/h	39.4	95.3	88.9	62.4
Performance of existing clinical prediction rules adapted from electronic questionnaire
STOP	85.6	51.9	60.2	80.9
STOP-Bang	91.0	45.8	58.7	85.7
AdMusted neck circumference score ≥48	39.2	85.6	69.8	62.4

Data presented as %. BMI Body mass index; NPV Negative predictive value; PPV Positive predictive value; RDI Respiratory disturbance index; Sens Sensitivity; Spec Specificity