Table 2. Diagnostic Testing for Obstructive Sleep Apnea.

Testing Modality	Parameters	Intended Use	Additional Factor
Polysomnography	Electroencephalogram, eye movements, chin tone, thoracic and abdominal excursion, airflow, pulse oximetry.	Criterion-standard tool for diagnosis of OSA and other sleep disorders.	Expensive; requires in-lab overnight stay.
Home Sleep Apnea Test	Different types of devices available Most common device includes: Airflow, respiratory effort, pulse oximetry.	Often first-line test in patients with high pre-test probability of OSA.	Lower cost; does not differentiate between sleep and awake states; false negatives occur.

Abbreviations: OSA = obstructive sleep apnea