“…Although in the past OSA prevalence was estimated as being 2%-4% among adults, 1 more recent studies have suggested mild and more severe OSA to be present in 26% and 12% of adults, amounting to >900 million and >400 million persons worldwide, respectively, 2 and a current meta-analysis of 99 studies of >47 000 persons reported adult prevalence of OSA of 56% and of moderate to severe OSA of 37%. 3 In this study, 87% of truck drivers, 78% of bus drivers, and 69% of "elderly" persons had OSA, with obesity (particularly of the neck and abdomen), male sex, hypertension, alcohol, and cigarette use all associated with greater risk. 3 OSA occurs more commonly among persons with diabetes, and is associated with insulin resistance, polycythemia, hypercoagulability, nonalcoholic fatty liver disease, and cardiovascular disease (CVD), including heart failure, with arrhythmias, and with increased mortality.…”