Bone erosion and psoriatic arthritis

[D Foster]

It's well known that the definition PsA is inadequate. I wonder how much of that 12% of subjects don't really have PsA. They have something else or it's just manifestations of Psoriasis.

You could also say how many that were diagnosed with EPP did not have PsA but some other type of arthritis , the point is that people with EFP were found to be significant by the fact that they had baseline PsA for at least 10 years and that 6 odd years was the sort of time that it took from a baseline to erosion taking place for the EPPs. The younger that PsA was diagnosed the less likely it would go on to be an EPP situation and the longer duration at baseline with PsA at a younger age decreased the odds of developing erosion .