Which outcome measure is most frequently used to classify the severity of CP?

The Gross Motor Function Classification System (GMFCS) is the most frequently used outcome measure for classifying the severity of cerebral palsy (CP). This tool specifically evaluates a child's gross motor function based on their capabilities and limitations in movement, providing a framework to categorize them into distinct levels of ability. The GMFCS is divided into five levels, ranging from Level I, which indicates the least severe impairment with the ability to walk without limitations, to Level V, which indicates the most severe impairment and a need for assistance in all mobility aspects.

Moreover, the GMFCS not only helps in understanding the current functional abilities of a child but also aids in tracking changes over time, making it highly useful for both clinical assessments and research purposes. Its widespread acceptance and integration into clinical practice emphasize its reliability and validity in reflecting gross motor function in individuals with CP, solidifying its role as the primary measure for assessing severity in this population.