Table 1

Categorisation of working diagnoses

• RA


• UA


• Non-RA:

"Inflammatory"

Psoriatic arthritis


Reactive/self-limiting inflammatory arthritis


Ankylosing spondylitis*


Enteropathic arthritis


Undifferentiated spondyloarthritis (not RA)


CTD


Crystal


Other


"Non-inflammatory"

Osteoarthritis


Noninflammatory arthralgia/other.


Categorisation of working diagnoses used amongst early arthritis patients at inception and follow-up during the course of this study. Consultant rheumatologists were asked to tick one box at each clinic visit, indicating the best description of their expert opinion of the diagnosis at a given time. See text. *Where modified New York criteria for the diagnosis of ankylosing spondylitis were not met, but the diagnosis was suspected in the context of seronegative inflammatory disease, consultants were asked to record a diagnosis of "undifferentiated spondyloarthritis".

Pratt et al. Arthritis Research & Therapy 2013 15:R118   doi:10.1186/ar4298

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