first of all, thank you for your dataset. Very valuable and a very nice example of open datasets that make our research move forward
I recently had access to the MESA dataset and I have a two questions regarding the actigraphy files:
Btw, I developed a package for actigraphy analysis that reads native .csv file from Respironics and I would be glad to help in extracting these start times (or just the month).
Thanks for the inquiry. I will email a dataset to you with the start month of each subject's actigraphy recording.