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Reliability of Gait Deviation Index in children with spastic cerebral palsy

Helle Mätzke Rasmussen, Dennis B. Nielsen, Niels W. Pedersen, Søren Overgaard, Anders Holsgaard-Larsen

Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, and Department of Clinical Research, University of Southern Denmark, Odense,

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DisclosuresRelated to present study

– Grant from University of Southern Denmark (HMR); Odense University Hospital Research grants 2012 (AHL), the Region of Southern Denmark Research grants and Ph.D. Grants 2012 (AHL), the Physiotherapy Praxis Foundation (HMR), Ludvig and Sara Elsass Foundation (AHL) and The Danish Physiotherapy Research Fund 2013 (HMR).

– No conflicts of interest (DBN, NWP, SO)

Outside present study– Board memberships (Finalized): Eli Lilly Denmark, Advisory board: Fostero (SO); MSD:

Advisory board : NSAID (SO); Mundipharma International Ltd (SO)– Investigator (Finalized) Sanofi-aventis Denmark A/S (SO)– Principal Investigator (Currently) Eli Lilly (SO)– Grants to Institution: Biomet DK and Biomet Inc: DePuy and Protesekompaniet (SO);

Zimmer (SO, DBN, NWP, AHL, HMR)

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3-diemensionel ganganalyse

Schwartz MH et al. (2008)

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Gait Deviation IndexGDI Kinematic variablesPelvic X 3Hip x 3Knee x 1Foot x 2

100 Point = Reference group 10 Point = 1 SD

0°

20°

20°

Plan

tar /

Dor

sal fl

exio

n

Step 100%0%

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Validity and reliability

Construct validity has previously been shown– FAQ, GMFCS, GMFM, GGI, CP Subtype

Reliability– Not investigated in children with CP

Schwartz MH et al. (2008), Molloy M et al. (2010), Massaad et al. (2013)

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Materials

18 ChildrenSubtype10 Unilateral CP8 Bilateral CP

GMFCS9 GMFCS level I9 GMFCS level II

AgeAge 5 – 12 years Mean age 7.8 (SD 2.11)

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Method TestTeam A

Retest

Laboratory Team B

Team C

+

Test Retest

+

Test Retest

+

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Results - Bland-Altman plot

Mean – 0.3

SEM 95%

SEM 95%

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Conclusion and perspective

Good reliability •Holds promise for the use of Gait Deviation Index as outcome measure in clinical research.

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Thanks!

Lotte Slot JensenDennis Brandborg Nielsen

FundingOdense Universitets frie forskningsmidler 2012Region Syddanmarks Forskningspulje 2012 og Ph.d. pulje 2012Fysioterapi Praksis FondenLudvig og Sara Elsass FondDanske fysioterapeuters ForskningsfondSyddansk Universitet