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STAGES annotation vs edf

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ShashaankVattikuti +0 points · 10 months ago

Hello,

First: I saw a similar issue posted and closed in the past. However my issue is not the same. https://sleepdata.org/forum/annotations-in-stages-dataset/1#comment-1003

For at least the MAYO data, I am finding that the annotation files start times do not match the EDF start time. For example, MAYO0002 starts at 22:24:10 (first event) but the EDF start time is 20:18:25. There's a two hour difference. I am not sure how to align the staging in the annotation file to the EDF. Please advise. MAYO0004 is like this as well as others.

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mrueschman +0 points · 10 months ago

Thanks for raising the issue. I see what you mean in those (and other) MAYO files. I'll inquire with the STAGES data contributor.

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ShashaankVattikuti +0 points · 10 months ago

Thank you. I made a minor clarifying edit to my issue. To be clear the issue is the time mismatch between the files. I also observe that the EDFs have some erroneous date, but I assume that was done on purpose. Aligning the start times between the annotation and EDFs, though, is the important issue.

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mrueschman +0 points · 10 months ago

Thanks for clarifying. You are correct - the original collection dates were all scrubbed from the EDFs as part of our normal de-identification process. We set all the calendar dates to 01/01/1985 - the first allowable date per the EDF specification.

My question to the STAGES team focused on the time mismatch. I opened 1-2 files from all the other sites and did not see similar mismatches. Looking back through old emails, I did see a couple mentions of the MAYO files being particularly difficult to process/harmonize, so perhaps some sort of inadvertent time shift occurred.

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mrueschman +0 points · 10 months ago

Today I removed the MAYO PSG data from the site at the behest of the STAGES team; please do so on your end as well. The data contributor recognizes these issues in the EDFs/annotations and hopes to reprocess/fix the MAYO files at a later date.

Thanks again for raising the issue here.

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ShashaankVattikuti +0 points · 10 months ago

Can I use the MAYO data knowing there is this annotation issue? Or, is this an official request to not use the data until it is fixed? I am fine either way.

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mrueschman +0 points · 10 months ago

I would request you not use the data until it is fixed (out of an abundance of caution).

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ShashaankVattikuti +0 points · 10 months ago

Acknowledged. We will not use the MAYO data until it is fixed. Thank you for looking into this.