We use cookies and other tools to enhance your experience on our website and to analyze our web traffic.
For more information about these cookies and the data collected, please refer to our Privacy Policy.

Central Sleep Apnea

2 posts
Was this reply useful? Learn more...
 
[-]
JeremyLevy +0 points · 2 months ago

Dear all,

I am working on the distinction between Central Sleep Apnea (CSA) and Obstructive Sleep Apnea (OSA).

After going over a few datasets (SHHS, MESA, CFS), I see that for the AHI, hypopnea and apneas (whether obstructive or central) are taken into account.

My question is the following: how should I compute the AHIc? I see that in some cases it takes into account hypopneas and central apneas. But not all hypopneas are central, there might be obstructive hypopneas as well, no? In this case, it is not clear to me how CSA is diagnosed from the PSG raw data.

Thanks in advance, Jeremy

6 posts
bio
Was this reply useful? Learn more...
 
[-]
Chao +0 points · 2 months ago

Also have this kind of problem. but for most articles, I see they use CAI most.

352 posts
bio
Was this reply useful? Learn more...
 
[-]
mrueschman +0 points · 2 months ago

Thanks Jeremy/Chao - good questions. In addition to the overall, combined AHI variables, most datasets will have obstructive apnea and central apnea indices alone, e.g. in SHHS --

If you look at the Calculations for these different indices you'll see that each event type has 4 components, which are individual event counts in REM/Supine, REM/Non-Supine, NREM/Supine, and NREM/Non-Supine.

Given that, you could recompute new AHI, AHIc, or other indices based on your final criteria of interest.

2 posts
Was this reply useful? Learn more...
 
[-]
JeremyLevy +0 points · about 2 months ago

Thank you for your answer