Which history findings suggest ankylosing spondylitis (AS))?

Updated: Feb 02, 2021
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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Key components of the patient history that suggest ankylosing spondylitis (AS) include the following:

  • Insidious onset of low back pain
  • Onset of symptoms before age 40 years
  • Presence of symptoms for more than 3 months
  • Symptoms worse in the morning or with inactivity
  • Improvement of symptoms with exercise [3]

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