Therapies. 1  Treatment for associated medical problems. 2  Possible causes of central sleep apnea include heart or neuromuscular disorders, and treating those conditions may help. 3  For example, optimizing therapy for heart failure may eliminate central sleep apnea. 4  Supplemental oxygen.
Some of these households, while actually being in the middle and thus sometimes referred to as being middle class, cannot, however, afford the middle class lifestyle. Yet another definition states that the statistical middle class includes all those households with income ranging from $25,000 to $100,000.
A new study says most Americans are no longer considered middle-class. By Andrew Soergel, Economy Reporter | Dec. 10, 2015, at 2:04 p.m. A new study suggests income gains among lower- and middle-income Americans over the last few decades pale in comparison to the country's highest earners.