Article

OBJECTIVE To investigate the psychometric properties of the five-repetition
sit-to-stand test, a functional strength test, in children with spastic diplegia.
DESIGN: Methodology study. SETTINGS: Hospital, laboratory or home. PARTICIPANTS:
In total, 108 children with spastic diplegia and 62 with typical development aged
from five to 12 years were tested. For test-retest reliability, 22 children with
spastic diplegia were tested twice within one week. INTERVENTIONS: Not
applicable. MAIN MEASURES: The five-repetition sit-to-stand test measures time
needed to complete five consecutive sit-to-stand cycles as quickly as possible.
The higher the rate of five-repetition sit-to-stand (repetitions per second), the
more strength a person has. RESULTS: The intraclass correlation coefficients of
intra-session reliability and test-retest reliability were 0.95 and 0.99
respectively. The minimal detectable difference was 0.06 rep/sec. The convergent
validity of the five-repetition sit-to-stand test was supported by significant
correlation with one-repetition maximum of the loaded sit-to-stand test,
isometric muscle strength, scores of Gross Motor Function Measure, and gait
function (r or rho = 0.40-0.78). For known group validity, children with typical
development and children classified as Gross Motor Function Classification System
level I performed higher rates of five-repetition sit-to-stand than children
classified as level II, and children classified as level II performed higher
rates than level III. CONCLUSION: The five-repetition sit-to-stand test was a
reliable and valid test to measure functional muscle strength in children with spastic diplegia in clinics.

Langue : ANGLAIS