Table 17: Normalized weight vector of each clinical risk factor, its ranking in OSA, and sensitivity/specificity with 95% CI of each severity group.

CriteriaFactorsNormalized weight vectorRankingSensitivity%
(95% CI)
Specificity%
(95% CI)

Severe OSAWitnessed snoring and apnea (A19)0.326192.32
89.62–94.51
Symptoms at nighttime awakening (A16)0.2452
Body built (A15)0.1293
Sleep maintenance (A18)0.116491.76
88.82–94.13
Epworth Sleepiness Scale (7/8) (A14)0.1035
Underlying diseases and personal variables (A17)0.086

Moderate OSAWitnessed snoring and apnea plus awakening due to chest discomfort (A12)0.481189.52
84.57–93.32
Decreased mental and physical performance (A10)0.2912
Epworth Sleepiness Scale (6/8) (A9)0.214388.18
85.51–90.52
Underlying diseases and surreal dream (A13)0.0134
Related personal variables (A11)05

Mild OSAChoking and witnessed snoring (A8)0.233191.08
85.49–95.04
Risk variables and work (A7)0.2032
Epworth Sleepiness Scale (3/8) (A5)0.194384.58
81.65–87.21
Causes of nighttime awakening (A4)0.1934
Lung diseases and sleep-wake pattern (A6)0.1775

No OSASymptoms during sleep (A2)0.476196.49
87.89–99.57
Epworth Sleepiness Scale (2/8) and related variables (A1)0.3972
Underlying diseases and sleep posture (A3)0.127381.23 
78.31–83.92