cdai_rheumatoid_arthritis: Clinical Disease Activity Index (CDAI) for Rheumatoid...

In cliot: Clinical Indices and Outcomes Tools

Clinical Disease Activity Index (CDAI) for Rheumatoid Arthritis

Description

Calculates the CDAI score to assess disease activity in patients with Rheumatoid Arthritis. Unlike the DAS28, the CDAI does not require laboratory results (ESR or CRP), allowing for immediate calculation during a clinical visit. It is the simple sum of the tender joint count (28 joints), swollen joint count (28 joints), and patient and provider global assessments (0-10 scale).

Usage

cdai_rheumatoid_arthritis(tender_joint_count, swollen_joint_count,
                          patient_global_assessment, provider_global_assessment)

Arguments

tender_joint_count	Numeric (0-28). Number of tender joints upon examination.
swollen_joint_count	Numeric (0-28). Number of swollen joints upon examination.
patient_global_assessment	Numeric (0-10). Patient's Global Assessment of disease activity on a visual analog scale (0 = best, 10 = worst).
provider_global_assessment	Numeric (0-10). Provider's Global Assessment of disease activity on a visual analog scale (0 = best, 10 = worst).

Value

A list containing:

CDAI_Score	The calculated score (Range 0-76).
Disease_Activity	Classification based on the score: Remission (<= 2.8), Low (> 2.8 - 10.0), Moderate (> 10.0 - 22.0), High (> 22.0).

References

Aletaha D, Smolen J. The Simplified Disease Activity Index (SDAI) and the Clinical Disease Activity Index (CDAI): a review of their usefulness and validity in rheumatoid arthritis. Clin Exp Rheumatol. 2005;23(5 Suppl 39):S100-8.

Examples

# Example 1: High Activity
# 8 tender, 6 swollen, Pt Global 7, Prov Global 6
# Score = 8 + 6 + 7 + 6 = 27
cdai_rheumatoid_arthritis(8, 6, 7, 6)

# Example 2: Remission
# 0 tender, 0 swollen, Pt Global 1, Prov Global 0.5
# Score = 1.5
cdai_rheumatoid_arthritis(0, 0, 1, 0.5)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.