How common is primary Osteoarthritis

How common is primary Osteoarthritis

Epidemiologic features of primary OA

  • • More common in men than in women aged <45 years; more common in women than men aged >45 years.
  • • Association with increased age.
  • • OA seen in an estimated 20% to 30% of the adult population.
  • • Symptomatic knee OA in 7% to 17%: hip OA in 10% of those aged >45 years.
  • • Radiographic knee OA in 14% to 37%; hip OA in 10%; hand OA in 35% to 45%.

Pearl : Radiographic OA is at least twice more common than symptomatic OA. Therefore, changes in OA on radiographs do not prove that OA is the cause of that patient’s musculoskeletal pain.

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