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What is the BASDAI?
The BASDAI, short for Bath Ankylosing Spondylitis Disease Activity Index, contains six questions regarding subjective symptoms during the week prior to answering the questions. The values range from 0-10 and are collected using VAS (please see our article on VAS for more info).
Here is the BASDAI in our questionnaire for Ankylosing Spondylitis participants filled in with example data:
