![]() Since PsA is a very complex disease, a different tool is needed to measure disease activity. The ACR20, which measures a 20% improvement in symptoms, may also be used, but it’s not used as often because new products need to meet a higher bar to earn FDA approval. They measure a 50% improvement and 70% improvement in RA symptoms, respectively, before starting treatment and after being on a treatment medication for a specific period of time. The ACR50 and ACR70 are the most commonly used ACR tests. ![]() Today, these scores are used in clinical trials and in the Food and Drug Administration (FDA) approval process as a way to record how effective a medication is at reducing symptoms. The test was created to help standardize the assessment and evaluation of the effectiveness of treatment. ACR scores are a way for doctors to measure the improvement people with RA have after taking medication.
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