MENLO PARK, Calif.
March 27, 2013
/PRNewswire/ -- Exponent, Inc. (NASDAQ: EXPO), is pleased to announce that its scientists have recently had their study on
mortality, cost, and health outcomes of total knee arthroplasty in Medicare patients
published online in the Journal of Arthroplasty.
In the study of
records, Exponent scientists examined the effects of joint replacement among nearly 135,000 patients with new diagnoses of
of the knee from 1997 to 2009. About 54,000 opted for knee replacement; 81,000 did not. Three years after diagnosis, the knee replacement patients had an 11 percent lower risk of
. And after seven years, their risk of dying for any reason was 50 percent lower.
The theory behind knee replacement, said the study's lead author, Dr.
, Senior Associate at Exponent, is that treating this degenerative condition will allow a return to normal activity and ultimately improve overall quality of life. "At the end of the day, we're trying to figure out if quantity of life increases as well," he added, noting that the team was conducting a similar review of Medicare data on the long-term benefits of hip replacement surgery.
"These patients had improved survivorship and reduced risk for cardiovascular conditions." "For an incremental cost of less than
per year, total knee replacement may reduce the risk of mortality by half."
A subsequent review of Medicare data on long term benefits of hip replacement surgery is showing that
Total Hip Replacement
(THR), or hip replacement, is associated with reduced mortality, heart failure, depression and diabetes rates in Medicare patients with
. The results of the study were presented at the 2013 Annual Meeting of the
American Academy of Orthopaedic Surgeons
(AAOS) held in
View the full abstract here:
Exponent, Inc. is a multidisciplinary organization of scientists, physicians, engineers, and business consultants performing in-depth investigations in more than 90 technical disciplines. The company investigates and analyzes failures and accidents to determine their causes and prevention and evaluates and solves complex human health and environmental issues. Exponent is certified to ISO 9001.