news-medical (25.09.2017) Sleep disorders and sleep deficiency are hidden costs that affect employers across America. Seventy percent of Americans admit that they routinely get insufficient sleep, and 30 percent of U.S. workers and 44 percent of night shift workers report sleeping less than six hours per night. In addition, an estimated 50-70 million people have a sleep disorder, often undiagnosed. Costs attributable to sleep deficiency in the U.S. was estimated to exceed $410 billion in 2015, equivalent to 2.28 percent of the gross domestic product.