Nearly half of all American adults will develop osteoarthritis of the knee by age 85. The odds increase if you are obese in middle age.
Your risk of having the painful condition increases as your body-mass index (BMI) rises, according to new research. People who were of normal weight at age 18 but were overweight or obese by 45 or older had the greatest risk.
The study analyzed data collected from more than 3,000 North Carolinians over a 13-year period.