Can you imagine voluntarily going in to have yourself plastered with goop and electrodes just to see if you snore? An awake partner is a better gauge and much cheaper.
Well I just went through a sleep study that was supposed to track my breathing during sleep. There were no frantic wake ups because I stopped breathing and only one rushed disconnect related to a bathroom break.
But even though I passed I am told my Dr. could still opt to have me use a CPAP machine. Either you need one or you don't.