I'm trying to understand what Hypopnea events are, and how to read the graphs in SleepyHead for them.
It seems that on nights where I didn't have any Hypopnea events, SleepyHead doesn't supply the "Flow Rate" graph -- so I'm guessing they have a lot to do with "Flow Rate" (whatever that is). I have a sneaky suspicion the answer lies in that Flow Rate graph, however it is scaled to -3950 to +3950 so there is no detail.
When I started CPAP treatment, my AHI was dominated by CA & OA events (54 AHI untreated). Last night I had a total of 3 events for the 9 hour session (treatment is obviously working great):
Hypopnea 2 events:
#001: 06:12:29 (17)
#002: 08:40:57 (16)
Obstructive Apnea 1 event:
#001: 08:30:45 (10)
I'm using SleepyHead v.0.9.4-1 unstable (built Oct 27, 2013).