Further Simplified Clinimetry Using a Multidimensional Health Assessment Questionnaire.

We agree that it is "good to simplify clinimetry in chronic inflammatory joint diseases," as suggested by DiCarlo and Salaffi in a recent editorial 1 concerning an article by Schneeberger et al, which showed that a Simplified Ankylosing Spondylitis Disease Activity Score (SASDAS) was similar to an ASDAS. 2 We note that the very high correlations of the SASDAS with the ASDAS2 are largely predictable, as the 5 measures in the 2 indices are identical, albeit with weighting in the ASDAS, although confirmation is reassuring.