Abstract: Objective To compare the advantages of two gross motor measure scales, Peabody Developmental Measure Scale Gross Motor (PDMS-GM) and Gross Motor Function Measure Scale (GMFM), in the evaluation of children with cerebral palsy (CP).Methods The gross motor functions of 29 CP children, 0-3 years old, were evaluated three times using PDMS-GM and GMFM respectively. The improvement percentile each month of PDMS-GM and GMFM were compared by t test.Results There was significant difference between the improvement percentile each month of PDMS-GM and GMFM. Conclusion The GMFM was more sensitive than PDMS-GM in the evaluation of CP children especially in the evaluation of treatment effect.

Key words: cerebral palsy, gross motor, Gross Motor Function Measure Scale (GMFM), Peabody Developmental Measure Scale-Gross Motor (PDMS-GM)