Talk to the Veterans Crisis Line now
U.S. flag
An official website of the United States government

Health Services Research & Development

Go to the ORD website
Go to the QUERI website

HSR&D Citation Abstract

Search | Search by Center | Search by Source | Keywords in Title

Defining Minimum Clinically Important Changes for the Patient Activity Scale II.

Baker JF, Katz P, Michaud K. Defining Minimum Clinically Important Changes for the Patient Activity Scale II. Arthritis care & research. 2021 Oct 1; 73(10):1456-1460.

Dimensions for VA is a web-based tool available to VA staff that enables detailed searches of published research and research projects.

If you have VA-Intranet access, click here for more information vaww.hsrd.research.va.gov/dimensions/

VA staff not currently on the VA network can access Dimensions by registering for an account using their VA email address.
   Search Dimensions for VA for this citation
* Don't have VA-internal network access or a VA email address? Try searching the free-to-the-public version of Dimensions



Abstract:

OBJECTIVE: To define the minimum clinically important improvement (MCII) and minimum clinically important worsening (MCIW) for the Patient Activity Scale II (PAS-II; range 0-10), a recommended patient-reported outcome measuring rheumatoid arthritis disease activity. METHODS: Data were taken from Forward, The National Databank for Rheumatic Diseases, from four 6-month data collection periods. Both anchor-based and distribution-based methods were used to estimate the MCII and MCIW. Anchor-based analyses used comparisons of pain and general health to the previous 6 months. Distribution-based analyses used 0.5 and 0.35 SDs. We stratified analyses based on the PAS-II score (above/below 3.7), hypothesizing that the MCII and MCIW would depend on the baseline score. To assess construct validity, we evaluated the odds of achieving the MCII in patients receiving new therapies. RESULTS: In the overall sample, for pain and general health anchor questions, the MCIW was 0.50 and 0.55, respectively. The MCII was defined as 0.39 and 0.45, respectively, for pain and general health. The MCIW for anchor-based methods among participants with low disease activity was 1.10 (1.09/1.11 [pain/general health]), while the MCII for those with moderate-to-high disease activity was 1.09 (1.15/1.02 [pain/general health]). Distribution-based methods for 0.5 and 0.35 SD were 1.08 and 0.76, respectively, for pain and general health. There was fair-to-excellent agreement with clinically important differences in assessments of pain and disability. Patients receiving new treatments had 30% greater odds of achieving the MCII. CONCLUSION: The minimum important change in PAS-II score was approximately 0.5. Among participants with a moderate-to-high PAS-II score , the MCII was 1.1, and among participants with low disease activity, the MCIW was 1.1.





Questions about the HSR&D website? Email the Web Team.

Any health information on this website is strictly for informational purposes and is not intended as medical advice. It should not be used to diagnose or treat any condition.