A comparative study of the usefulness of the Bath Ankylosing Spondylitis Functional Index and the Dougados Functional Index in the assessment of ankylosing spondylitis (Dutch).
The Dougados functional index with the 5-point Likert scale is sensitive to change due to intensive physiotherapy and exercise in spondyloarthropathy.
Evaluation of a functional index and an articular index in ankylosing spondylitis (DFI – French).
http://www.ncbi.nlm.nih.gov/pubmed/3283358Validation of the Italian versions of the Bath Ankylosing Spondylitis Functional Index (BASFI) and the Dougados Functional Index (DFI) in patients with ankylosing spondylitis.
http://www.ncbi.nlm.nih.gov/pubmed/16258600A comparative study of the usefulness of the Bath Ankylosing Spondylitis Functional Index and the Dougados Functional Index in the assessment of ankylosing spondylitis (Dutch).
http://www.ncbi.nlm.nih.gov/pubmed/10229428