Some brain scans like P_ZOKGBZ have a PSG timepoint in lieu what seems to be a baseline time point. Usually I expect 1.0 or 6.0 or 9.0 etc but here Is this PSG timepoint another way to say 1.0? Thanks

Created by Victor Zeng victorzeng97
Could you edit https://www.synapse.org/Synapse:syn53910452/wiki/631084 to describe that? Thank you
For P_ZOKGBZ I am seeing HAB_1.0 image data for MRI, PiB, and FTP. Where are you not seeing a HAB_1.0 for P_ZOKGBZ? Is that from one of the spreadsheets of ROI data? More generally, the answer to your question is no. PSG is not another way of saying 1.0, PSG codes visits that were paired with a polysomnograph study. When in doubt be sure to use the date information. The dates are blinded by participant, so the difference between dates within a participant are accurate and can be used to model time for data analysis. For example the time elapsed between the HAB_1.0 cognitive data and the PSG MRI session will tell you how long from the baseline assessment the MRI took place.

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