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Hi,
does anyone know if CHAT and NCH Sleep DataBank have the raw PPG signal? (not SpO2).
In the project description and related articles, it's not mentioned specifically the "pleth" channel.
Hi Sharon. The CHAT studies do generally have a PPG signal. The montage information can be viewed at https://sleepdata.org/datasets/chat/pages/equipment/montage-and-sampling-rate-information.md. Note that these studies were collected across multiple data collection sites, so naming of the channel might differ between sites. There might also be the occasional study where the signal is missing if a site experienced equipment issues and was unable to collect the signal. For the NCH Sleep DataBank, the depositor of the data did not provide us with a full list of what was collected in each study, but I did take a look at about 10 randomly selected EDF files and did not see a PPG signal in any of the 10. Thanks, and please let us know if you have any other questions.