North Star Ambulatory Assessment Clinical Classification

**Semantic type:** Intellectual Product

**Definition:** A standardized 17-item scale that was developed by Elaine Scott and Michelle Eagle in 2011 to measure functional motor ability in ambulant children and adolescents with Duchenne muscular dystrophy. The instrument, which is partly based on the Hammersmith Motor Ability Scale (2003), utilizes a 3-point rating scale to grade activities ranging from standing to running, as well as abilities that are necessary for a patient to remain functionally ambulant and that are known to progressively deteriorate in untreated DMD.

**Synonyms:** - NSAA - NSAA - NSAA1