Precise Meaning of MIN and MED

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
Eddi
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Precise Meaning of MIN and MED

Post by Eddi » Wed May 08, 2024 6:40 am

Hi_ iahev been assuming that MIN is the lowest my SPO2 went and MED the average. My figures are usually around 89 for MIN and 95 for MED. I have looked for the meanings in the help sections but couldn't find the definitions. It is many years since I did Maths!

Have I assumed correctly? I should add that my nightly AHI is usually well ender 1, sometimes 0!

kindest regards

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vandownbytheriver
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Re: Precise Meaning of MIN and MED

Post by vandownbytheriver » Wed May 08, 2024 9:33 am

MED is short for Median:

To find the median: Arrange the data points from smallest to largest. If the number of data points is odd, the median is the middle data point in the list. If the number of data points is even, the median is the average of the two middle data points in the list.

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Eddi
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Re: Precise Meaning of MIN and MED

Post by Eddi » Sat May 11, 2024 8:33 am

Thank you kindly. I didn't make myself clear. All I see is MIN with a figure under it and then MED with a different figure. I have been assuming that these are the most important figures to take note of. So when it says 87 under MIN 87 is the owest my SPO2 went and 95 under MED is the average?

I didn't understand your reply at all. I don't recall any of my math excet the usual.

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Pugsy
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Re: Precise Meaning of MIN and MED

Post by Pugsy » Sat May 11, 2024 8:42 am

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

Math refresher course if interested.

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onward60
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Re: Precise Meaning of MIN and MED

Post by onward60 » Sat May 11, 2024 10:30 am

There is something important about the MED related to CPAP therapy, isn't there? I just can't remember what it is.

EDIT: This was actually a serious question that I actually wanted to know the answer to.

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MyIdaho
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Re: Precise Meaning of MIN and MED

Post by MyIdaho » Sat May 11, 2024 11:42 am

onward60 wrote:
Sat May 11, 2024 10:30 am
There is something important about the MED related to CPAP therapy, isn't there? I just can't remember what it is.
Why the snark? Just answer the question. Med is short for Median. Half of the values will be below the median and half above. It is a much better measure of central tendency than average. Extreme values can inflate or reduce the average. Median is not affected by extreme values.

dataq1
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Re: Precise Meaning of MIN and MED

Post by dataq1 » Sat May 11, 2024 9:56 pm

Median is not affected by extreme values.
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Re: Precise Meaning of MIN and MED

Post by dataq1 » Sat May 11, 2024 10:03 pm

Choosing the appropriate measure depends on the context and the nature of the data. If outliers are present, the median may be a better representation of central tendency. However, both measures provide valuable insights depending on the situation.
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MyIdaho
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Re: Precise Meaning of MIN and MED

Post by MyIdaho » Sun May 12, 2024 11:08 am

dataq1 wrote:
Sat May 11, 2024 10:03 pm
Choosing the appropriate measure depends on the context and the nature of the data. If outliers are present, the median may be a better representation of central tendency. However, both measures provide valuable insights depending on the situation.
Definitely agree! What's happening on the fringe can be very diagnostic. Examples 95% measure of blood oxygen or leak rate. If I only looked at the median, it would suggest I never have any leaks but the 95% leak measure usually shows a value.

Eddi
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Re: Precise Meaning of MIN and MED

Post by Eddi » Thu May 23, 2024 9:28 am

Replying to Pugsy: thank you for that. I read it. I got from it that the figures are meaningless. I know my min is 11 co the machine is set 11-20. My mdeian was 16.74 and according tot his article, that means for 50% of th time my pressure was at 16.74 or less than that. That is not hepful. I have no idea if that is good or bad.

I guess th only figure that I ought to note is the AHI which in this case was 0.00. Last night it was 0.27. Despite this, I needed a nap which lasted 2hrs. I thik this is because my pain has mulitplies a ot recently so I am kore tired than usual.

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robysue1
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Re: Precise Meaning of MIN and MED

Post by robysue1 » Thu May 23, 2024 5:27 pm

Eddi wrote:
Thu May 23, 2024 9:28 am
Replying to Pugsy: thank you for that. I read it. I got from it that the figures are meaningless. I know my min is 11 co the machine is set 11-20. My mdeian was 16.74 and according tot his article, that means for 50% of th time my pressure was at 16.74 or less than that. That is not hepful. I have no idea if that is good or bad.
It's neither good nor bad. But it's not quite meaningless either. What that median pressure of 16.74 means is that you're not hitting max pressure for significantly long periods of time each night. (Hitting your max pressure for significantly long periods of time each night can, under some circumstances, indicate that the pressure settings---either min pressure or max pressure or both---might be set too low.)
I guess th only figure that I ought to note is the AHI which in this case was 0.00. Last night it was 0.27. Despite this, I needed a nap which lasted 2hrs. I thik this is because my pain has mulitplies a ot recently so I am kore tired than usual.
Your AHI figures (which are superb) indicate the current pressure settings are doing a good job of preventing your obstructive apneas and hypopneas from occurring. The fact that you're dealing with more pain that usual is easily enough to explain the need for a nap as well as any feeling that you are not sleeping as well as the data would indicate you're sleeping.
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Eddi
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Re: Precise Meaning of MIN and MED

Post by Eddi » Thu May 23, 2024 10:50 pm

Thaks Robby Sue. As yu can maybe tell Iam up at 5:45am, since 4:30am because of pain. I am hapy with my AHI. Having a nap is very unusual sinc ebeing treatd for OSA.