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Updated: Jul 16, 2026

Behavioral and Locomotor Measurements Using an Open Field Activity Monitoring System for Skeletal Muscle Diseases
Published on: September 29, 2014
Developing international consensus on measures of improvement for patients with myositis
Peter A Lachenbruch1, Frederick W Miller, Lisa G Rider
1FDA Center for Biologics Evaluation and Research, USA. lachenbruchpa@aol.com
Abstract:
We discuss methods of developing consensus in measuring improvement in myositis. We consider selecting candidate variables, reliability and validity, percentage improvement/worsening rules, rules based on CART and logistic regression. We discuss criteria for determining an acceptable rule that include both numerical measures and physician acceptance.
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