(06-24-2012, 11:05 AM)Sleepster Wrote: I have no idea why the number in parentheses is sometimes less than 10, but when I zoom in on the Flow Rate graph and look at them, it's a stretch to conclude that they last the full 10 seconds requied for a score.
There's some weirdness in the calculation.
The air reduction has to be more than x%, but the length of the apnea is measured for a time period when the airflow reduction is somewhat less. Sometimes this cause the duration reported to be higher than you think it is.
Also, if you take a few deep breaths before the apnea, the baseline the apnea is measured against may shift.