How food and drink affect your sleep. What you eat and drink before bed can affect your sleep. For example, foods containing the amino acid tryptophanâa building block of the sleep-related chemical serotoninâcould potentially make you drowsy, although evidence is mixed as to whether the amount in food is enough to change your sleep.
The study estimates lifetime societal savings (net present value) of about $12 billion from the more than 600,000 total knee replacement surgeries performed each year in the U.S. These societal savings primarily accrue to patients and employers.
When arthritis pain in one or both hips prevents even basic activities such as walking, many people decide that it is time for hip replacement surgery. According to a statistic cited by the American Academy of Orthopaedic Surgeons, every year more than 285,000 total hip replacements are performed in the United States.