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SHHS Dataset HRV Analysis

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DibishaTP +0 points · 26 days ago

Hi team, I was trying to understand the HRV analysis of SHHS dataset - shhs1. I could see that, the HRV features are starting from a Start_sec , say for example, for ID 200079, the Start_sec is 6960, the features from 0 to 6960 is not available. But the corresponding annotations file has label from 0 to 6960 as WAKE. So could you please let me know why the HRV features are not available from 0 to 6960 secs?

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mrueschman +0 points · 26 days ago

Thanks for checking out the site. In SHHS, HRV analysis was only performed during sleep time. From https://sleepdata.org/datasets/shhs/pages/13-hrv-analysis.md:

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summary (Entire night) - Analysis is performed from sleep onset to sleep termination. This analysis requires the following information: the time of occurrence of each R-wave, and the sleep onset and termination times. These times were extracted from the file containing the sleep stage annotations as the first and last 30 sec episode of stage 1, 2, 3 or 5 (REM), respectively. RR intervals larger than 2.5 seconds were excluded from the analysis.

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DibishaTP +0 points · 16 days ago

Thank you for your response!! For the analysis of https://sleepdata.org/datasets/shhs/files/m/browser/datasets/hrv-analysis/shhs2-hrv-5min-0.19.0.csv is the tool mentioned in https://physionet.org/content/pcst/1.0.0/ is used OR any other tool was utilized? If the tool from physionet is used, Could you please let me know what are the configuration settings used for analysis?

For eg: HRVparams.sqi.LowQualityThreshold is one of the settings parameter. Could you please help me understand what was the value set for this parameter during the 5 minutes csv features generation.

Similarly if any other settings parameters were used, could you please help me understand them?

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mrueschman +0 points · 12 days ago

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".

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DibishaTP +0 points · 9 days ago

Thankyou!