Using Optimal Test Assembly Methods for Shortening Patient‐Reported Outcome Measures: Development and Validation of the Cochin Hand Function Scale‐6: A Scleroderma Patient‐Centered Intervention Network Cohort Study

The OTA procedure generated a valid short form of the CHFS with minimal loss of information compared to the full-length form. The OTA method used was based on objective, prespecified criteria, but should be further studied for viability as a general procedure for shortening patient-reported outcome measures in health research.