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.
For men and women over age 80, hip replacement surgery may still be a viable option, according to a study published in the December 2007 issue of The Journal of Bone and Joint Surgery. Patients 80 and older are experiencing success with hip replacements comparable to those of their younger counterparts.Â© 2008, Jupiter Images Corp. More than 234,000 total hip replacements (also known as hip arthroplasties) are performed in the U.S. each year; this number has increased dramatically in the last decade.The study compared patients 80 years old and above with those who were 70 years old and below.atients 80 and older are experiencing success with hip replacements comparable to those of their younger counterparts. Â© 2008, Jupiter Images Corp. More than 234,000 total hip replacements (also known as hip arthroplasties) are performed in the U.S. each year; this number has increased dramatically in the last decade.