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.
According to the National Center for Health Statistics, more than 650,000 arthroscopic lavage and debridement (cleaning and smoothing) procedures are performed for knee pain each year in the United States, at an average cost of $5,000 each. Studies Question Effectiveness of Procedure.