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Rheumatology 2007 46(12):1747-1748; doi:10.1093/rheumatology/kem238
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© The Author 2007. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

EDITORIALS

Psoriatic arthritis is a joint-damaging disease—a call for action!

W. J. Taylor1 and P. S. Helliwell2

1Department of Medicine, University of Otago Wellington, New Zealand and 2Academic Section of Musculoskeletal Medicine and Rehabilitation, University of Leeds, UK.

Correspondence to: W.J. Taylor, Department of Medicine, University of Otago Wellington, New Zealand. E-mail: will.taylor@otago.ac.nz

The first 10% of the full text of this article appears below.

In this issue of the journal, Morgan and colleagues [1] present data from the Norfolk Arthritis Register (NOAR) that confirm psoriasis–associated inflammatory arthritis is associated with similar 5-yr outcomes to inflammatory arthritis without psoriasis. The importance of this finding is that it was derived from observing an inception cohort. NOAR represents a possibly unique resource for observing the natural history of inflammatory arthritis. Prognostic studies that commence observation later in the history of the disease (commonly after presentation to secondary or tertiary referral centres) have many potential biases that confound simple interpretation. The most pertinent bias is that less severe disease or disease that appears to remit quickly may never be observed. When comparing the outcome of one disease with another, such comparisons may be difficult to interpret when the extent . . . [Full Text of this Article]


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