TABLE VI.F.1.

Overview of the types of sleep testing, strengths, and associated limitations

	Type I	Type II	Type III	Type IV
Specifications	Full-attended polysomnography (≥7 channels) EEG, EOG, EMG, ECG, airflow, effort, oximetry	Full-unattended polysomnography (≥7 channels) EEG, EOG, EMG, ECG, airflow, effort, oximetry	Limited channel devices (four to seven channels) ECG, airflow, effort, oximetry	One or two channels with one typically being oximetry Oximetry and other
Common examples	Routine polysomnography	NA	Alice PDX Apnealink PAT	Pulse oximetry
Strengths	Gold-standard sleep staging and event scoring	Done at home Diagnostic accuracy to rule in/out OSA	Done at home Sufficient to rule in OSA	Done at home Simple set up
Limitations	Requires subject to stay overnight in the sleep lab and has greater associated costs	Requires technical expertise to set up and administer appropriately Not appropriate for complex patients	High level of pre-test probability required in order to accurately diagnose OSA	Very limited data collected Additional testing often warranted