Correlation between pressures and AHI

[Bluesv6]

So I was diagnosed with mild sleep apnea in January . Knowing very little knowledge I questioned 5 to 20 for prescription .  I was like mild why would I need up to 20 ?  Also question too how accurate my sleep study as I slept that night but not a deep sleep.  I found once falling into deep sleep my pressures would shoot up to 14 to 16 with ffm. 

Now using pillows and run between 10 to 12 most nights and I'd spike to 13 or under 14 

My question is that alot of people here seem to run low pressures compared to mine . So does that mean ahi is related to cpap pressure .

Like the higher your cpap pressure the worse your apneas are ? Or is it just that's the pressure that is required to keep your air way open ? 

This is strictly a question related ask . I am doing research on my condition of having sleep apnea and have wondered for a while. So thought I would ask here

[Gideon]

Pressure is very individual though most users need somewhat lower pressures.
Everything dealing with treatment is pressure related though there is no strict correlation between severity and pressure.

Step 1 is to manage OA events with Pressure. Then add EPR to treat vhypopnea, flow limits and RERAS. Pressure may need to be adjusted.

I like to see users start at 7 or 8 cmw. High pressure should be managed via treatment of events instead of artificially lowering max pressure but sometimes lowering max is needed.

[Bluesv6]

Thank you for taking time to respond and explaining it is appreciated