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 data collected in 2012-13 more than 25,000 knee replacement surgeries were carried out, the cost of which was funded through private health insurance. The expenses incurred on these operations including the cost of prostheses amounted to a total of $522 million.