Send to:

Choose Destination
See comment in PubMed Commons below
Arch Iran Med. 2008 Mar;11(2):162-5. doi: 08112/AIM.008.

The prevalence of psoriatic arthritis in psoriatic patients in Tehran, Iran.

Author information

  • 1Department of Dermatology, Tehran University of Medical Sciences, Tehran, Iran.



Psoriatic arthritis is an inflammatory arthritis which is associated with psoriasis. There is no general agreement in the literature regarding the epidemiology of psoriatic arthritis. In this study, we evaluated the prevalence of psoriatic arthritis in a relatively large number of psoriatic patients.


Three hundred and twenty patients with psoriasis were evaluated in a cross-sectional study. The psoriasis area and severity index, family history, demographic variables, and some other factors (e.g., clinical type and location of the disease) were assessed. The patients were examined for signs of arthropathy and the suspects were referred to a rheumatologist for further evaluation and confirmation of the diagnosis.


Psoriatic arthritis was observed in 29 (9.1%) patients. The prevalence of Psoriatic arthritis in men (10.1%) was not statistically different from that of women (7.8%). The most common type of psoriasis in all patients, with and without psoriatic arthritis, was chronic plaque psoriasis. The mean+/-SD psoriasis area and severity index was significantly (P<0.05) higher in patients with psoriatic arthritis (24.33+/-10.36) than those without psoriatic arthritis (10.70+/-8.44). Nail involvement was significantly more common in patients with psoriatic arthritis than those without psoriatic arthritis. HLA B27 was the most common HLA detected in patients with psoriatic arthritis.


Dermatologists are usually the first physicians to detect signs and symptoms of psoriatic arthritis and need to work closely with rheumatologists to establish the diagnosis and start appropriate treatments which will address both the skin and the joint disease.

[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Academy Of Medical Sciences of I.R. of Iran
    Loading ...
    Write to the Help Desk