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Hi, I was hoping you could clarify the following regarding overlapping the actigraphy, psg and sleep stages data.
I think that I have successfully extracted the overlapping data using the csv, edf and xml files for the actigraphy, psg and sleep stages data respectively. However, there are inconsistencies regarding the number of data points that I have extracted from them. For all of the individuals I obtain 2 extra actigraphy datapoints than sleep stages data points. In the case of the psg data, I use a rolling average to obtain data with 30 second epochs - however still obtain a larger number of points.
Is this to be expected and may I assume that, as long as the start times are in line as given by the overlap information, I can discard the extra data points? Or does this inconsistency mean that it is likely that I have made a mistake?
Many thanks!
I have a quick question about the MESA data
I am trying to align the actigraphy and PSG data but cannot download the PSG XML annotations (error code 'token not authorised'). Is this something we need to request access for separately? Any other tips for merging the data would also be great!
Thank you!