Background and Significance of the
Problems
Osteoarthritis of the knee is a common chronic
condition and most often occurs in middle-aged and
older women. Typically osteoarthritis manifests after
the age of 60 years, but more than 80% of people
over 50 years old have radiological evidence of
osteoarthritis.1
Osteoarthritis is one of the major
causes of pain and physical impairment that
decrease quality of life.2-7 In Thailand, back pain
and arthritis are two of the most health problems
among people aged 50-59 years, and tend to
increase in prevalence in advancing age.8
Another