darco wrote:
My question tho is the pressure. Before the change, I was 9cm for 95% of time. Now its reporting I am at 10cm for 95% of my night.
You are misinterpreting the meaning of the 95% numbers.
When the 95% pressure is reported as 10cm, that means that for 95% of the time the machine was running, the pressure was AT or BELOW 10 cm. It does NOT mean that your pressure was at 10 cm for 95% of the night. (It also means that your pressure was AT or ABOVE 10 cm for AT LEAST 5% of the night and your pressure was ABOVE 10cm for LESS THAN 5% of the night.)
In fact, when we actually look at the pressure line, you'll notice that the
only times the machine raised the pressure above your min setting of 9 cm is (a) when the machine is
testing a small pressure increase to see if your breathing pattern improves and the machine decides that there is not enough improvement to warrant increasing the pressure and (b) a roughly 30 minute period starting around 12:30 AM when the machine raised the pressure from 9 to 10 cm in response to the two closely space H's that are scored right before this pressure increase. The events stopped and the machine did not see any need to raise the pressure any further. And you had the machine running for a total of 7 hours and 40 minutes. And note that 30 minutes is approximately 6.25% of 7 hours and 40 minutes. Since your pressure was AT or ABOVE 10 cm for a bit more than 6% of the night, that explains why the 95% pressure level is listed as 10 cm: For roughly 94% of the night your pressure was LESS THAN or EQUAL TO 9 cm, but to compute the 95% pressure level, we have to add in "the first 1% of the time" your pressure was at 10 cm.
For some detailed examples of how average, median, 90% and 95% statistical numbers are computed and how to interpret them you might want to read my blog entry
Average, Median, 95% numbers: A guide to those who don't remember their introductory stats
