Rheumatology

Simplified Disease Activity Index (SDAI) calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Tender joint count (28 joints)

Allowed range: 0–28

Swollen joint count (28 joints)

Allowed range: 0–28

Patient global disease-activity assessment (0–10 cm)

Allowed range: 0–3.94 in

Evaluator global disease-activity assessment (0–10 cm)

Allowed range: 0–3.94 in

C-reactive protein

mg/dL

Allowed range: 0–100 mg/dL

Result

5 fields remaining

Anyone can run this calculator. Sign in to save, favourite, or send the result.

Ruqelo is AI and can make mistakes. Check important information.

Clinical inputs

Tender joint count (28 joints)Accepted range: 0 to 28
Swollen joint count (28 joints)Accepted range: 0 to 28
Patient global disease-activity assessment (0–10 cm)Accepted range: 0 to 10
Evaluator global disease-activity assessment (0–10 cm)Accepted range: 0 to 10
C-reactive protein (mg/dL)Accepted range: 0 to 100

Primary source

Formula: Smolen JS et al. A simplified disease activity index for rheumatoid arthritis for use in clinical practice. Rheumatology (2003). Bands: Aletaha D et al. Remission and active disease in rheumatoid arthritis: defining criteria for disease activity states. Arthritis Rheum (2005) (2005)

View source