Clinical Features of Late-onset Ankylosing Spondylitis: Comparison with Early-onset Disease

The Journal of Rheumatology, 04/09/2012

Montilla C et al. – The study suggests that age at onset of AS affects the patients’ presenting clinical form. Arthritis of the upper limbs requires a differential diagnosis with other conditions frequent in patients over 50 years of age, such as rheumatoid arthritis or crystal–induced arthropathy.

Methods

  • The authors studied late–onset AS in the National Registry of Spondyloarthritis of the Spanish Society of Rheumatology (REGISPONSER database) cohort (n = 1257), of whom 3.5% had onset at age ≥ 50 years versus a control group with onset at < 50 years.

Results

  • There were no differences between late–onset and early–onset AS according to sex and family history of spondyloarthropathies.
  • Patients in the late–onset group more often showed involvement of the cervical spine (22.7% vs 9.7%; p = 0.03) and arthritis of the upper (13.6% vs 3.0%; p = 0.002) and lower limbs (27.3% vs 15.2%; p = 0.03) as first manifestations than did patients in the early–onset group.
  • A higher percentage of mixed forms (axial and peripheral joint disease) during the course of the disease was also recorded in the late–onset group (50% vs 24%; p = 0.0001).

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