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. Author manuscript; available in PMC: 2015 Jul 22.
Published in final edited form as: Ann Rheum Dis. 2014 Jan 7;74(5):830–835. doi: 10.1136/annrheumdis-2013-203967

Figure 1.

Figure 1

Person-Item distribution of the sample with the final 17 items. Interpretation of the figure: The horizontal line represents the latent trait ‘functioning’ according to the International Classification of Functioning, Disability and Health. The value of −3 means that a patient with a score result on the left side of the continuum has no major limitation in functioning. The lower the score, the better the ‘functioning’.