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Does 10 EEG arousals/hour mean sleep apnea?
#1
Does 10 EEG arousals/hour mean sleep apnea?
I was always pretty good at algebra but I can't make sense of this set of data.

Normal AHI is 0-5; above that and you have sleep apnea.

Normal RDI is 0-5; above that and you have sleep apnea.

RDI = AHI + RERAs/hour*

So, if you have an AHI of 5, even a single RERA all night means you have sleep apnea!

Yet normal people have at least 10 EEG arousals PER HOUR - which are essentially RERAs!!**

Where have I misunderstood?

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*A RERA is an abnormal breathing event which does not meet the criteria of an Apnea or an Hypopnea, but is an “arousal” event associated with a respiratory effort as noted by EEG.

**"EEG Arousal Norms by Age" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2564772/
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