Research visit
During the visit, conducted in a university movement laboratory, the
following self-reported disease-specific questionnaires were collected:
Bath AS Functional Index (BASFI), composed of 10 questions about
functional limitation; the Bath AS Disease Activity Index (BASDAI),
composed of six questions pertaining to fatigue, spinal pain, joint
pain/swelling, areas of localised tenderness and morning stiffness; and
the Bath AS Patient Global score (BAS-G) which asks about the person’s
well-being over the past week and the past six months. Along with height
and weight, spatiotemporal gait data was captured using an IMU (LPMS-B2,
Life Performance Research, Japan) placed on projected centre of mass
(L4). The standardised index of functional tests (Table 1) was
instructed and measured by an experienced physiotherapist, then
performed and captured by video recording for CV-aided analysis.
Following the laboratory research visit, the participant performed and
captured video of the same index of tests at their home using a personal
smartphone camera, tablet camera or webcam. (Figure 1)