The Dyskinetic Cerebral Palsy Functional Impact Scale : Development and validation of a new tool

Journal article

Stewart, Kirsty, Lewis, Jennifer, Wallen, Margaret, Bear, Natasha and Harvey, Adrienne. (2021). The Dyskinetic Cerebral Palsy Functional Impact Scale : Development and validation of a new tool. Developmental Medicine and Child Neurology. 63(12), pp. 1469-1475. https://doi.org/10.1111/dmcn.14960
AuthorsStewart, Kirsty, Lewis, Jennifer, Wallen, Margaret, Bear, Natasha and Harvey, Adrienne
Abstract

Aim
To outline the development and examine the content and construct validity of a new tool, the Dyskinetic Cerebral Palsy Functional Impact Scale (D-FIS), which measures the impact of dyskinesia on everyday activities in children with cerebral palsy (CP).

Method
D-FIS content was informed by a systematic review of dyskinesia outcome measures, in collaboration with children with dyskinetic CP, parents, caregivers, and expert clinicians. The D-FIS uses parent proxy to rate impact of dyskinesia on everyday activities. Construct validity was determined by examining internal consistency; known groups validity with the Gross Motor Function Classification System (GMFCS), Manual Ability Classification System (MACS), Communication Function Classification System (CFCS), and Eating and Drinking Ability Classification System (EDACS); and convergent validity with the Barry-Albright Dystonia Scale (BADS).

Results
Fifty-seven parents of children (29 males, 28 females, mean [SD] age 11y 8mo [4y 4mo], range 2y 6mo–18y) completed the D-FIS. Correlation between D-FIS and GMFCS was r=0.86 (95% confidence interval [CI]: 0.77–0.91, p<0.001); MACS r=0.84 (95% CI: 0.73–0.90, p<0.001); CFCS r=0.80 (95% CI: 0.67–0.88, p<0.001); and EDACS r=0.78 (95% CI: 0.66–0.87). Correlation between D-FIS and BADS was r=0.77 (95% CI: 0.64–0.86, p<0.001). Cronbach’s alpha was 0.96.

Interpretation
The D-FIS demonstrates good construct validity and high internal consistency. The D-FIS will be useful for identifying priorities for intervention. It adds to the measurement tool kit for children with dyskinetic CP by addressing functional impact of dyskinetic movements and postures.

Year2021
JournalDevelopmental Medicine and Child Neurology
Journal citation63 (12), pp. 1469-1475
PublisherMac Keith Press
ISSN0012-1622
Digital Object Identifier (DOI)https://doi.org/10.1111/dmcn.14960
Scopus EID2-s2.0-85108187512
Page range1469-1475
FunderNational Health and Medical Research Council (NHMRC)
Publisher's version
License
All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online19 Jun 2021
Publication process dates
Accepted19 May 2021
Deposited05 Nov 2021
Grant IDNHMRC/1057997
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