Abstract: Objective To analyze the content validity of Gross Motor Function Measure (GMFM) for cerebral palsy. Methods Concept contained in each item of GMFM was determined by 3 rehabilitation physicians or therapists who evaluated with GMFM for more than 2 years. All the concepts extracted were discussed in a meeting. The terms finalized were linked to the categories of International Classification of Functioning, Disability and Health Child and Youth version (ICF-CY) by 2 rehabilitation physicians who are familiar with the terms of ICF-CY according to the linking rules after discussion. Third party would intervene informally if there was a disagreement. The distribution of the ICF-CY categories involved were analyzed. Results 88 items from the GMFM linked to 27 categorise of 3rd level within 12 categories of 2nd level, belong to b7 Neuromusculoskeletal and Movement-related Functions and d4 Activities. 86 items linked to d4x, and 47 of then linked to b7x too. 2 items linked to b7x only. 16 items linked to the categories added to ICF-CY 16 times, involved 3 3rd level categories in a 2nd level category. Conclusion GMFM mainly focused on the activities in the framework of ICF-CY, especially the activities of changing and maintaining functional as well as the body posture and walking or moving. For the body function, the GMFM mainly focus on the support from arms.

Key words: cerebral palsy, Gross Motor Function Measure, International Classification of Functioning, Disability and Health Child and Youth version, validity