Corriveau H, Hébert R, Prince F, Raı̂che M. Postural control in the elderly: an analysis of
test-retest and interrater reliability of the COP-COM variable. Arch Phys Med Rehabil 2001;
82: 80-5. Objectives: To estimate the test-retest and interrater reliability of the center of
pressure-center of mass (COP-COM) variable of postural control in the elderly. Design: The
biomechanic variable COP-COM, which represents the distance between the COP and the
COM, was determined from 2 AMTI force platforms and 3 OPTOTRAK® position sensors …