NSRR staff
Boston, MA
0000-0002-0506-8368
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Please submit a data request to obtain access to the STAGES datasets and PSG files. The file are restricted to approved users. You can start a data request here: https://sleepdata.org/data/requests/stages/start
Thanks for using the NSRR!
I suggest reading more in the literature about the device used in MESA, the Actiwatch Spectrum. I did find this link, https://www.labfront.com/article/comparing-motionlogger-with-actiwatch-2, which suggests the Philips Actiwatch-2 (a precursor to the Spectrum) used proportional-integrating mode (PIM).
The Philips devices output the data in a single format, so to my knowledge it's not possible to go back and re-output/re-derive the watch data using other methods (e.g., ZCM).
Thanks for using the site!
I'm guessing it's a problem with the pasting. Try both "CTRL+V" and clicking the Command Prompt icon in the upper left of the window, then going to Edit, and then Paste.
I upgraded to the latest Ruby 3.1.3 to confirm the download process still works, which it did for me.
Another option is to include your token in the nsrr download command itself. Instead of running nsrr download nchsdb try the following:
nsrr download nchsdb --token=<insert token here>
That is, if your token was 12345 the command could look like nsrr download nchsdb --token=12345
Thanks for checking out the site.
The information I emailed to the user in that old forum thread is available in the Actigraphy and polysomnography overlap section on the other documentation link you provided (https://sleepdata.org/datasets/mesa/pages/actigraphy-introduction.md).
Yes, the process could "more or less be a cut and paste". The Profusion XML files contain a SleepStaging section that provides 30-second by 30-second sleep staging output (https://sleepdata.org/datasets/mesa/pages/polysomnography-introduction.md). You could take those staging indicators and paste/insert them into the actigraphy CSV files at the epoch line number indicated in the special overlap dataset. The rpoints files utilized the staging information from the XML files, so you could also merge them with the actigraphy CSVs.
I can't think of any other variables to give sleep/wake to compare with the actigraphy data.
The token is not shown when pasted or typed at the command prompt. Try pressing enter and continuing in the process.
Hi - thanks for letting us know. Please let us know if you're unable to (ultimately) download specific files. We haven't had any other reports of download problems, so the occasional timeout/failure wouldn't concern me.
I believe the STAGES signal names are not harmonized across sites, so you will find different signal labels in the EDF headers from site to site.
I suggest checking out the documentation provided in this folder as you go through the EDFs from different sites - https://sleepdata.org/datasets/stages/files/original/Site%20Specific%20PSG%20Notes%20and%20Information
ECG/EKG data collection may have differed between sites.
Hey DibishaTP - thanks for bringing your questions to the forum. Unfortunately, we didn't receive much documentation about the actigraphy device and output from STAGES. There was a brief discussion about it on the forum previously - https://sleepdata.org/forum/stanford-dataset-documentation/
Further, I don't think you'll be able to overlap the STAGES polysomnography and actigraphy data. The actigraphy data were provided to the NSRR as date-shifted files (random shifting amounts unknown to us), however the EDFs had all date references stripped.
Thanks Jeremy/Chao - good questions. In addition to the overall, combined AHI variables, most datasets will have obstructive apnea and central apnea indices alone, e.g. in SHHS --
If you look at the Calculations for these different indices you'll see that each event type has 4 components, which are individual event counts in REM/Supine, REM/Non-Supine, NREM/Supine, and NREM/Non-Supine.
Given that, you could recompute new AHI, AHIc, or other indices based on your final criteria of interest.
What you see on the "13-hrv-analysis" page is what we received from the data creators. We don't have any specifics about configuration settings.
I believe the SHHS data were run on an older version of the PhysioNET HRV toolkit - the original link no longer works but here's an archived copy: https://web.archive.org/web/20170615014052/https://physionet.org/tutorials/hrv-toolkit/
The latest tool, PCST (https://physionet.org/content/pcst/1.0.0/), has this note: "It [PCST] was shown to be equivalent to the PhysioNet C HRV Toolkit".