Intrasession reliability of the "center of pressure minus center of mass" variable of postural control in the healthy elderly.
Arch Phys Med Rehabil
; 81(1): 45-8, 2000 Jan.
Article
en En
| MEDLINE
| ID: mdl-10638875
OBJECTIVES: To estimate the intrasession reliability of a single measure of the biomechanical variable "center of pressure minus center of mass" (COP-COM) to determine, first, how many trials must be averaged to obtain a reliable measure of postural stability, and second, the minimal metrically detectable change of the COP-COM. PARTICIPANTS: Community-living, healthy, elderly people over 60 years of age (n = 7). DESIGN: Measurements were made in double leg stance, eyes-open condition. Nine successive trials, with rests between, were carried out for each subject. DATA ANALYSIS: Intraclass correlation coefficients (ICCs). MAIN OUTCOME MEASURE: The biomechanical variable COP-COM, which represents the distance between the center of pressure and the center of mass, was measured from two force platforms and three position sensors. RESULTS: The ICCs obtained for one measure of the COP-COM were .79 in the anterior-posterior (AP) direction and .69 in mediolateral (ML) direction. With four trials, the COP-COM variable is reliable at .94 in the AP direction and .90 in the ML direction. Minimal metrically detectable changes were .10 mm (AP) and .16 mm (ML). CONCLUSION: Using four repetitions of the COP-COM variable provides a reliable measurement of postural stability.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Postura
/
Equilibrio Postural
Límite:
Aged
/
Humans
/
Middle aged
Idioma:
En
Revista:
Arch Phys Med Rehabil
Año:
2000
Tipo del documento:
Article
País de afiliación:
Canadá
Pais de publicación:
Estados Unidos