Table 2.
Thirty-two features input in both SVM model and logistic regression
| Demographics | Anthropometric | Comorbidities | Sleep history | Symptoms suggestive of OSA |
|---|---|---|---|---|
| Age | BMI | Hypertension | SOL (min) | Snore |
| Gender | Neck circumference | Diabetes | SOL < 30 min | Witnessed apnea |
| Alcohol consumption | Waist circumference | CAD | Sleep duration, <6, 6–8, and ≥8 h | Frequency of nocturia (time/night) |
| Current smoking | CHF | Unrefreshed sleep | Nocturia ≥2 times/night | |
| Hypnotics | CVA | Frequency of awakenings at sleep (time/night) | Witnessed leg jerks in sleep | |
| CKD | Awakenings in sleep ≥3 times/night | Morning headache | ||
| COPD | ESS | Dry throat at waking up | ||
| Asthma | EDS | |||
| Hypothyroidism |
CAD, coronary artery disease; CHF, congestive heart failure; CVA, cerebrovascular accident; CKD, chronic kidney disease; COPD, chronic obstructive pulmonary disease.