Ankylosing Spondylitis Disease Activity Score with CRP (ASDAS-CRP)
Overall neck, back, or hip pain over the last week on a 0-10 scale.
0-10
BASDAI question 6 over the last week on a 0-10 scale.
0-10
Average global assessment of spondylitis activity over the last week on a 0-10 scale.
0-10
Overall joint pain or swelling outside the neck, back, or hips over the last week on a 0-10 scale.
0-10
Enter CRP in mg/L. Values below 2 mg/L are standardized to 2 mg/L in the formula.
mg/L
Clinical noticeEducational support for axial spondyloarthritis disease-activity assessment only. Interpret with full clinical context.
Context and use
ASDAS-CRP = 0.12 x back pain + 0.06 x duration of morning stiffness + 0.11 x patient global + 0.07 x peripheral pain/swelling + 0.58 x ln(max(CRP, 2) + 1)
The displayed score is rounded to 2 decimals; classification uses the unrounded raw value.
If entered CRP is below 2 mg/L, the formula uses 2 mg/L and returns an explicit warning.
