how can we determine our own AHI?

gailzee · Post by **gailzee** » Sat Feb 19, 2005 4:16 pm

Besides being techno phobic and getting ""HELP"" txs.....how does one figure out their own AHI using their data from for ex. the silverlining software?
Just curious?

Txs.........

rested gal · Post by **rested gal** » Sat Feb 19, 2005 6:05 pm

Add together your apneas and hypopneas. Ignore the snores, flow limitations. Just add the apneas and hypopneas together. Divide that number by the total number of hours you slept.

Example:

3 apneas, 7 hypopneas = 10
Slept 6 hours (divide 10 by 6) = 1.6

The AHI for that night is 1.6

Hey, somebody - I'm so math challenged, I didn't dare use anything but an even number for hours slept. heheh. How do you come up with a figure for "hours of sleep" to divide by, if you slept, say, 6 hours 38 minutes?

At first I thought, well, divide by 6.38 but with 60 seconds in an hour, can't use a decimal point that way, can we? Geeze, this is embarrassing to admit my math-less-ness. LOL! How do you change the 38 minutes into something you can divide into the AH total?

I loved the Silverlining software, but I did always wish it would simply state the AHI and not make me drag out a calculator.

chrisp · Post by **chrisp** » Sat Feb 19, 2005 6:15 pm

38 min = .633 hr

gailzee · Post by **gailzee** » Sat Feb 19, 2005 6:45 pm

As usual rested gal, you come to the rescue!

I will check my #'s.!!!

rested gal wrote:Add together your apneas and hypopneas. Ignore the snores, flow limitations. Just add the apneas and hypopneas together. Divide that number by the total number of hours you slept.

Example:

3 apneas, 7 hypopneas = 10
Slept 6 hours (divide 10 by 6) = 1.6

The AHI for that night is 1.6

Hey, somebody - I'm so math challenged, I didn't dare use anything but an even number for hours slept. heheh. How do you come up with a figure for "hours of sleep" to divide by, if you slept, say, 6 hours 38 minutes?

At first I thought, well, divide by 6.38 but with 60 seconds in an hour, can't use a decimal point that way, can we? Geeze, this is embarrassing to admit my math-less-ness. LOL! How do you change the 38 minutes into something you can divide into the AH total?

I loved the Silverlining software, but I did always wish it would simply state the AHI and not make me drag out a calculator.

rested gal · Post by **rested gal** » Sat Feb 19, 2005 6:57 pm

chrisp, I just know you're doing this to me deliberately and laughing at your computer!! LOL!

I have no shame so I'll keep asking - how did you do that? What am I gonna do when the next night is 6 hours and 23 minutes and you aren't online!!??? LOL

How do you arrive at "38 min = .633 hr" ??

I can spell, but I'm pathetic when it comes to numbers. Help!!

derek · Post by **derek** » Sat Feb 19, 2005 7:08 pm

Hey Rested One,
If you have a calculator, divide the number of minutes by 60 to give you the fraction of an hour, Using the example of 38 minutes -
38/60 = 0.633
so that if you slept for 7 hours 38 minutes that's 7.633 hours.

derek
btw - take a look at my thread on my RemStar Auto Snore detection experiments.

Mikesus · Post by **Mikesus** » Sat Feb 19, 2005 7:09 pm

Hmmm, I thought the Remstar uses the snores in the AHI?

I.E.

my report from yesterday

Flow limititations 1.8
Obstrutive Apneas 2.2
Hypopneas 2.1
Snore 25.1
--------------------------
31.2 / 8 = 3.9 Which is the AVG AHI

(weird thing is that the detail says 4.3??)

Anyway if I added only the OA's and the Hypo's that would be 4.5 and an AHI of .5 ?

I am confused...

derek · Post by **derek** » Sat Feb 19, 2005 7:21 pm

Mike,
No, no, no...
The numbers you give ARE the indices (events/hour). So to compute your AHI you simply add your AI (2.2) and HI (2.1) to get AHI = 4.3 - which is what the machine told you in the detail.
To find the total humber of apneas, multiply the AI by the duration of the session, similarly for the HI. So if you slept for 10 hours the numbers would be
Apneas: 2.2x10 = 22
Hypopneas: 2.1x10 = 21

derek
... your apap twin

rested gal · Post by **rested gal** » Sat Feb 19, 2005 7:22 pm

Derek, thank you, thank you!

I know it's said, "There's no such thing as a dumb question..."

However, I know well and good... I asked a dumb question that any fifth grader would have known how to do.
I mean...heck, chrisp did it!

I just go blank on stuff like that.

But hey, now I know how to do it. The wonders of the internet. Thank you!

Mikesus · Post by **Mikesus** » Sat Feb 19, 2005 7:24 pm

derek wrote:Mike,
No, no, no...
The numbers you give ARE the indices (events/hour). So to compute your AHI you simply add your AI (2.2) and HI (2.1) to get AHI = 4.3 - which is what the machine told you in the detail.
To find the total humber of apneas, multiply the AI by the duration of the session, similarly for the HI. So if you slept for 10 hours the numbers would be
Apneas: 2.2x10 = 22
Hypopneas: 2.1x10 = 21

derek
... your apap twin

Oops... Trying to make it harder than it is...

Thanks!!

Still don't quite understand how the Avg could be 3.9 then tho

gailzee · Post by **gailzee** » Sat Feb 19, 2005 7:49 pm

Let me get this straight (as I was absent for math a LOT) you tkae your a's, and hypop's and divide by number of hrs slept, to get your AHI?
remember you're dealing with me now, one who is lucky to get on/off the computer without a map.

ha.....
So this is what a big Satuday night becomes eh?

derek wrote:Mike,
No, no, no...
The numbers you give ARE the indices (events/hour). So to compute your AHI you simply add your AI (2.2) and HI (2.1) to get AHI = 4.3 - which is what the machine told you in the detail.
To find the total humber of apneas, multiply the AI by the duration of the session, similarly for the HI. So if you slept for 10 hours the numbers would be
Apneas: 2.2x10 = 22
Hypopneas: 2.1x10 = 21

derek
... your apap twin

rested gal · Post by **rested gal** » Sun Feb 20, 2005 12:46 am

LOL, yep, Gail. Saturday night with calculator and measuring stick!

how can we determine our own AHI?

how can we determine our own AHI?

txs

I'm sorry I asked................