Once a person has one sleep problem, they are less able to cope with another one. For example, persons with obstructive sleep apnea are less able to cope with the demands of shift work.
A. Vakulin and colleagues pubished "Effects of Alcohol and Sleep Restriction on Simulated Driving Performance in Untreated Patients With Obstructive Sleep Apnea" in this months issue of Annals of Internal Medicine. This study compared patients with untreated OSA and matched controls on a driving simulator. The study found that "Patients with OSA are more vulnerable than healthy persons to the effects of alcohol consumption and sleep restriction on various driving performance variables. "