Going back to the original magazine abstract, the following quote was included:
You should also keep in mind that it is important to set up your continuous positive airway pressure (CPAP) under typical sleeping conditions. Therefore, if you drink alcohol daily but abstain prior to your titration study, the pressure may not be adequate to maintain your airway when you drink. If you wish to maximize your therapy, consider the role that alcohol use plays in treating your sleep apnea.
That implies that the use of alcohol at or near bed time results in the requirement for additional CPAP pressure to maintain an open airway. Obstructive apneas result, sometimes, from the loss of muscle tone in the airway muscles. Partial arousal causes the muscles to regain tone and open the airway. If the effect of alcohol is to reduce the muscle tone even more, the airway may require this additional pressure to compensate.
Just some thoughts. The OP was inquiring about the effect of alcohol on apnea and I thought this article was on point.
Oracle 452 Lessons Learned Updated
DSX900 AutoSV with HC150 extra humidifier and Hibernite heated hose
Settings: EPAP Min-10.0, EPAP Max-17, PS Min-3, PS Max-10, Max Pressure-20, Rate-Auto, Biflex-1.
Sleepyhead and Encore Pro 2.21.