Yuvalbse

Hi NSRR team,

Currently, I'm working with MESA and SHHS datasets and I'm interested in investigating hyper ventilation. Can you please tell me if they contain such a parameter somewhere? I couldn't find it in both the XML files and the Variables section.

Maybe there is another database that includes this parameter?

Thanks with advanced, Yuval Ben Sason.

Thank you Mike.

It is a useful information for me.

Yuval.

Hi Mike,

There are about 230 subjects out of the cohort, around 4% of all patients.

Thanks for your response, Yuval.

Hi NSRR team,

I am working with the SHHS1 dataset and I ran into inconsistency between my analysis results and some of your reported variables in the 'shhs1-dataset-0.14.0' form, in particularly with the 'supinep' and 'slpprdp' variables. I'll be thankful if we could figure it out together.

As part of my analysis I am deriving the TST and the total sleep time in supine position of each patients and as sanity check I compared my results with yours. Most of the time, our results are consistent (even identical) in both parameters, however, there are still few mismatches.

In order to understand the gap, I plotted the position-during-sleep over the whole-position-raw-signal and and over the sleep-stages to verify that it is indeed in the sleeping periods. (In order to make the graph clearer, I added +6 to the position signal to separate between the sleep stages signal and the position signal). The figures are attached below.

• Notice that position=8 is the supine position (2+6) and that sleep stages=0 is 'awake'.

Some cases for instance (all are in hours)-

I'll be glad to hear your opinion on the differences and willing to send you all the cases where my results are dissimilar to yours.

Please let me know if something isn't clear enough,

Yuval Ben Sason,

AIMLab., Technion.