As one who went thru this bullsh*t....
Everything above is true. The doctors are absolutely your enemy when it comes to this stuff. Tell them NOTHING! It almost seems they're looking for a reason to ground you as if they have an internal competition for that... Or who can give out the most referrals in a month or some crap like that... For the most insignificant issue.
There used to be a few "good ones" to go to who were big picture but they've been swallowed by the EK machine and run scared from fleet IMO.
DO NOT EVER, EVER USE THE WORD SNORE AT THE EK CLINIC!! Kiss of death and career.
In my 7 plus years, I had to take 4 sleep studies. And was required to wear this device my last year at Slave Ship Airlines, called a cpap machine 85%of the time while at EK.... It was required by GCAA. As someone says, the sleep is recorded on an SD card and you are required to send this in to sleep study doctor for analysis. Total and complete PITA!
I know one longtime FO at SS Airlines who has been doing this for a number of years.
Tell them at your own peril...