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SDNN and SDNNIDX - SHHS

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mbradicich +0 points · 2 months ago

Hello everyone

In the SHHS data set there are two heart rate variability values, sdnn and sdnnidx, that are a standard deviation and a mean of the standard deviations respectively. Which is/are the mean variable(s) they are referring to?

Thank you in advance for your help!

Best regards Matteo

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