“…These assessments included the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) as a measure of current disease activity (Figure 2),16 healthrelated quality of life was monitored via howRu (
; four components: pain or discomfort, feeling low or worried, limited in what you can do and require help from others) and physical activity via the validated short form of the International Physical Activity Questionnaire (IPAQ;
), which assesses physical activity frequency, intensity and duration. The howRu questions have better readability statistics and a similar overall performance when based on a single point in time compared with the longer SF1217 and EQ-5D
18. Additionally, an open text question was added to the IPAQ to capture the different activity types patients were undertaking.…”