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Measuring improvement in RA: ACR (American College of Rheumatology); HAQ (Health Assessment Questionnaire); DAS28 (Disease Activity Score)
| ACR | HAQ | DAS28 | |
|---|---|---|---|
| continuous |
meanACR |
HAQ %-improvement |
DAS28 |
| |
ACRhybrid |
|
|
| binary |
ACR 20 |
HAQ 20∗ |
|
| |
ACR 50 |
HAQ 50∗ |
|
| ACR 70 |
∗Note: HAQ 20 and HAQ 50 are not validated response measures, they have been created here for the purpose of illustrating the loss of power in binary vs. continuous measures.
