Is WatchPAT from Itamar medical a home sleep monitor or sleep apnea monitor? Can it be used to generate the ground truth for sleep staging? Any reliable references of the use of the device as a home sleep monitor compared with the standard polysomnograms are appreciated.
Dear Anusha,
The WatchPAT is a home sleep monitor validated in normal pupulations and in groups with high prevalence of obstructive sleep apnea. It has shown a moderate agreement with polysomnography in these groups (Cohen's Kappa coefficient of 0.475) This is a well written validation study:Article Sleep Staging Based on Autonomic Signals: A Multi-Center Val...
However, I am now working on a validation study comparing WatchPAT with PSG in patients with COPD, and I find a lower agreement in this group. It seems to underestimate total sleep time and sleep efficiency, and overestimates apnea hypopnea index in COPD. So it might depend on the population you want to study, and to what extend you want it to exactly match PSG.Best regards,
Nils H. Holmedahl
Thank you Sir.
We intend to use WatchPAT to generate the ground truth for WAKE, LIGHT, DEEP and REM stages of sleep in normal healthy subjects. As sleep monitoring in the natural environments are required a validation against conventional PSG is not possible.
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