Fatigue in psoriatic arthritis - a cross-sectional study of 246 patients from 13 countries.

Objectives: Fatigue is an aspect of psoriatic arthritis (PsA), which is important to patients. The objective was to evaluate magnitude of fatigue in PsA patients and to assess factors that might explain high levels of fatigue.

Methods: This was an ancillary analysis of a cross-sectional study in 13 countries of unselected PsA patients who fulfilled the CASPAR criteria.