# CDAI Clinical Disease Activity Index Calculator

Introduction

Calculating the Clinical Disease Activity Index (CDAI) is crucial in assessing disease activity in patients with rheumatoid arthritis. This article provides a comprehensive guide on utilizing a CDAI calculator, explaining the formula, offering an example solve, and addressing frequently asked questions.

## How to Use

To utilize the CDAI calculator, follow these steps:

- Input the required parameters: tender joint count (TJC), swollen joint count (SJC), patient global assessment (PGA), and evaluator global assessment (EGA).
- Click the “Calculate” button to obtain the CDAI score.

## Formula

The CDAI is calculated using the following formula:

Where:

- TJC = Tender Joint Count
- SJC = Swollen Joint Count
- PGA = Patient Global Assessment
- EGA = Evaluator Global Assessment
- CRP = C-Reactive Protein (mg/dL)

## Example Solve

Let’s consider an example:

- TJC = 10
- SJC = 8
- PGA = 50
- EGA = 40
- CRP = 2

Plugging these values into the formula:

CDAI=10+8+44.72+2

CDAI=64.72

So, the CDAI score is 64.72.

## FAQ’s

**Q: What is the significance of CDAI in rheumatoid arthritis management?****A:** CDAI helps in evaluating disease activity and guiding treatment decisions in rheumatoid arthritis patients.

**Q: Can CDAI be calculated without CRP values?****A:** Yes, it can be calculated without CRP, but including CRP enhances its accuracy.

**Q: Is the CDAI score interpreted differently for different patients?****A: **No, the interpretation remains consistent across patients, with higher scores indicating greater disease activity.

## Conclusion

The CDAI calculator is a valuable tool for healthcare professionals in assessing disease activity in rheumatoid arthritis patients. By understanding its formula and application, clinicians can make informed treatment decisions, ultimately improving patient outcomes.