Oscar question

On the left sidebar in Oscar under statistics, it has a list of things and shows values for Min, Med, 95% and Max. What exactly is the meaning of Med and 95%?

Median is literally the "middle of the pack" value.

It is not skewed by a small fraction of extremely large or small values unlike "the average".

So it is a better "typical" value.

The 95th percentile number means that 95% of the time other values are LOWER than this number.

It is only exceeded 5% of the time.

GrumpyHere wrote: ↑

Sat Jul 24, 2021 3:27 am

Median is literally the "middle of the pack" value.

It is not skewed by a small fraction of extremely large or small values unlike "the average".

So it is a better "typical" value.

The 95th percentile number means that 95% of the time other values are LOWER than this number

No it doesn't. it means that 95% of the numbers collected are at or below that number..

GrumpyHere wrote: ↑

Sat Jul 24, 2021 3:27 am

It is only exceeded 5% of the time.

Again, it means that 5% of the numbers are at or above that number.

It's a meaningless number, except for statisticians.

A good explanation of the significance (or lack thereof) of these statistics is here:

http://adventures-in-hosehead-land.blog ... de-to.html

While PR is technically correct -- medians and percentiles are actually referring to collections of numbers -- the numbers (measurements) are reported at regular time intervals, so it's not wrong to think of those numbers as representing time.

The "max" column is mis-labeled for ResMed machines. It is actually the 99.5 percentile, not the max. The column heading is fixed in the next release of OSCAR.

It is math.

So I should be precise.

Will do better.

BlueDragon wrote: ↑

Sat Jul 24, 2021 8:27 am

While PR is technically correct -- medians and percentiles are actually referring to collections of numbers -- the numbers (measurements) are reported at regular time intervals, so it's not wrong to think of those numbers as representing time.

The "max" column is mis-labeled for ResMed machines. It is actually the 99.5 percentile, not the max. The column heading is fixed in the next release of OSCAR.

Thanks, BlueDragon! Can these numbers be used to help choose a person's best min & max pressure settings? Or how are they used?

Yes, the median etc. pressures, in conjunction with observation of the various graphs, can be used to help select an initial minimum pressure. It is not just the numbers alone that matter; other factors contribute to pressure needs and adjusting them may change pressure needs. Yes, I know that does not give you a cookbook answer. The best thing to do is to post an OSCAR Daily screenshot and ask for advice.

It is often not necessary to be concerned about maximum pressure. It's usually ok just to set the max pressure to 20. The machine will raise the pressure only as much as it needs to. However, there are situations where setting a lower maximum pressure is useful -- pressure intolerance, events that aren't going to be solved by any amount of pressure although the machine still tries, aerophagia, other comfort issues, etc.

Can u help me with figuring out the exact time on my breathing results.??

Traci wrote: ↑

Mon Jul 26, 2021 2:57 pm

Can u help me with figuring out the exact time on my breathing results.??

BlueDragon wrote: ↑

Sun Jul 25, 2021 11:13 pm

The best thing to do is to post an OSCAR Daily screenshot and ask for advice.

JPB