🦴 Ankylosing Spondylitis BASDAI Activity Simulator

Fatigue Level Assessment

Fatigue is one of five patient-reported domains feeding the BASDAI score.

• 0–10: Scale range (visual analogue scale)
• 7 days: Recall window (past-week average)
• 1 of 5: Domain weight (BASDAI questions)
• Patient: Reported by (self-assessment)

Why fatigue matters

Fatigue often precedes flares and tracks with systemic inflammation.

Placeholder: fatigue score is entered directly on the BASDAI questionnaire.

Spinal and Hip Pain Rating

Axial pain is the hallmark symptom of ankylosing spondylitis.

• 0–10: Scale range (visual analogue scale)
• SI joints: Common sites (spine, hips)
• 1 of 5: Domain weight (BASDAI questions)
• Inflammatory: Pattern (worse with rest)

Axial pain pattern

Pain typically improves with movement and worsens after inactivity.

Placeholder: spinal/hip pain anchors the axial component of the score.

Peripheral Joint Pain and Swelling

Peripheral arthritis can accompany axial disease in some patients.

• 0–10: Scale range (visual analogue scale)
• Knees, ankles: Common joints (asymmetric pattern)
• 1 of 5: Domain weight (BASDAI questions)
• ~30%: Prevalence (placeholder figure)

Peripheral involvement

Swelling and tenderness outside the spine are scored separately.

Placeholder: peripheral joint symptoms add a distinct BASDAI input.

Morning Stiffness Duration and Severity

Stiffness duration and intensity form two related BASDAI questions.

• 0–120 min: Duration range (slider input)
• 0–10: Severity scale (visual analogue scale)
• 2 of 5: Domain weight (duration + severity)
• >30 min: Typical flare (placeholder threshold)

Stiffness scoring

Longer, more severe morning stiffness raises the composite score.

Placeholder: stiffness duration and severity are averaged together.

BASDAI Score and Activity Threshold

A score of 4 or higher generally indicates active disease.

• 0–10: Score range (composite index)
• ≥ 4: Active threshold (clinical cutoff)
• Score-based: Biologic candidacy (plus NSAID failure)
• Periodic: Reassessment (placeholder interval)

Interpreting the score

The gauge marks where the current inputs fall against the threshold.

Placeholder: scores at or above 4 suggest escalation of therapy.