Which history findings suggest ankylosing spondylitis (AS))?

Updated: Sep 03, 2019
  • 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 [2]

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