Defining Substantial Clinical Benefit for Patient-Rated Outcome Tools for Shoulder Impingement Syndrome

The SCB of 40% for the DASH, and 20% and 21 points for the Penn represents substantial improvement over 6 weeks of care, which was sustained at 12 weeks. The SCB of 11 points for the DASH is not recommended for use because of poor discrimination. The SCB can be used to enable clinical decision-making and in future clinical trials. Alternative approaches such as the within- and between-group change values can produce different SCB values.