Article

The aim of this study was to determine the psychometric properties, content
range, and measurement precision of a lower extremity physical functioning and
mobility skills item bank (LE85) in children with cerebral palsy (CP). METHOD:
Lower extremity functioning and mobility skill items were administered to 308
parents of children (169 males, 139 females; mean age 10y 8mo, SD 4y) with
spastic CP (145 diplegia, 73 hemiplegia, 89 quadriplegia; [for one person type of
CP was unknown]) classified using the Gross Motor Function Classification System
(75 level I, 91 level II, 79 level III, 37 level IV, 26 level V). Additional
legacy measures were administered to assess concurrent validity. Psychometric
characteristics, differential item functioning, content range, and score
precision were examined. RESULTS: The LE85 had acceptable psychometric
properties. Content range matched the ability range of the sample population and
exceeded legacy measures with minimal differential item functioning. The LE85 had
good correlation with the Paediatric Outcomes Data Collection Instrument,
Functional Independence Measure for Children, Gillette Functional Assessment
Questionnaire, and Paediatric Quality of Life Inventory-CP module (range
r=0.63-0.86). Precision of the LE85 and 10-item simulated computer adaptive test
scores outperformed legacy measures. INTERPRETATION: The LE85 appears to be
suitable to administer as a computer adaptive test to measure lower extremity
physical functioning and mobility in children with CP.

Langue : ANGLAIS