Alternative Ways to Quantify Sustained Remission: Applying the Continuity Rewarded Score and Patient Vector Graph

Area of Science:

• Rheumatology
• Clinical Trial Analysis
• Statistical Methods in Medicine

Background:

• The Computer Assisted Management in Early Rheumatoid Arthritis Trial-II (CAMERA-II) indicated clinical benefits of methotrexate (MTX) plus prednisone over MTX with placebo.
• However, the difference in remission rates was only significant in one of three analyses, suggesting limitations in conventional assessment methods.

Purpose of the Study:

• To evaluate if the Continuity Rewarded (ConRew) score and a simple sum score could better differentiate remission between treatment arms in CAMERA-II.
• To assess the added value of patient vector graphs in visualizing remission data compared to standard box plots.

Main Methods:

• The ConRew score, which prioritizes continuous remission periods, was applied alongside a simple sum score of 4-week remission periods.
• Patient vector graphs were utilized and compared against conventional group-level box plots.

Main Results:

• Both the simple sum score and ConRew score demonstrated significantly higher (more favorable) remission in the MTX + prednisone group compared to the MTX + placebo group (P=0.003 and P=0.004, respectively).
• Patient vector graphs visually depicted more frequent and longer remission periods in the MTX + prednisone group, offering additional insights beyond box plots.

Conclusions:

• The simple sum score, ConRew score, and patient vector graphs enhance the understanding and discriminatory power in analyzing remission outcomes in early rheumatoid arthritis.
• These methods provide a more nuanced assessment of treatment efficacy in clinical trials.