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cvd_dthdt Notation Check

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sylviemona +0 points · 2 months ago

Hi,

I would just like to check on the meaning of the cvd_dthdt variable. In the label it references time till first instance of CVD; however, in the description, it indicates it is time until death from CVD. Which one is correct?

Thank you in advance!

https://sleepdata.org/datasets/shhs/variables/cvd_dthdt

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mrueschman +0 points · 2 months ago

Sorry for the confusion. The "time until death" is the correct definition. We will update this an upcoming release for these variables:

https://sleepdata.org/datasets/shhs/variables/chd_dthdt

https://sleepdata.org/datasets/shhs/variables/cvd_dthdt

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sylviemona +0 points · 2 months ago

Thanks for that! I believe then that there is no variable for time until first instance of CVD?

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mrueschman +1 point · 2 months ago

That's correct. There are individual "time until X" variables like MI, CABG, PTCA, etc. I think the CVD death variable is a composite that the dataset owners created from the other "time until fatal X event" variables, so you could probably create your own "time until first instance of CVD" from some of the other CVD Outcomes variables.

Some information here from the SHHS authors: https://sleepdata.org/datasets/shhs/files/documentation?f=SHHS_CVD_Outcomes_Protocol.pdf

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