Reliability of Isometric Lower-Extremity Muscle Strength Measurements in Children With Cerebral Palsy: Implications for Measurement Design.
Background. Children with cerebral palsy (CP) typically show muscle weakness of the lower extremities, which can be measured with the use of handheld dynamometry(HHD). Objective. The purposes of this study were: (1) to determine test-retest reliability and measurement error of isometric lower-extrem...
| Publicado en: | Physical Therapy Vol. 93; no. 7; pp. 935 - 942 |
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| Autores principales: | , , , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Oxford University Press / USA
Jul2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104215191&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104215191 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00319023 PTH jtl: Physical Therapy issn: 00319023 maglogo: N pubinfo: dt: Jul2013 vid: 93 iid: 7 pid: 10398 pub: Oxford University Press / USA artinfo: ui: 104215191 89857572 10.2522/ptj.20120079 NLM23538586 104215191 ppf: 935 ppct: 7 formats: fmt: @attributes: type: P tig: atl: Reliability of Isometric Lower-Extremity Muscle Strength Measurements in Children With Cerebral Palsy: Implications for Measurement Design. aug: au: Willemse, Lydia Brehm, Merel A. Scholtes, Vanessa A. Jansen, Laura Woudenberg-Vos, Hester Dallmeijer, Annet J. affil: Dept. of Rehabilitation Medicine, VU University Medical Center, Amsterdam, the Netherlands; EMGO Institute for Health & Care Research, VU University Medical Center, Amsterdam, the Netherlands; Research Institute MOVE, VU University Medical Center, Amsterdam, the Netherlands sug: subj: Muscle Strength Evaluation Lower Extremity Isometric Contraction Cerebral Palsy Physiopathology Muscle Weakness Diagnosis Equipment Reliability Muscle Spasticity Physiopathology Muscle Strength Evaluation Dynamometry Portable Equipment Psychometrics Clinical Assessment Tools Scales Validation Studies Test-Retest Reliability Measurement Error Intraclass Correlation Coefficient Sample Size Intrarater Reliability Data Analysis Software Analysis of Variance Confidence Intervals Child Adolescence Human Child: 6-12 years Adolescent: 13-18 years ab: Background. Children with cerebral palsy (CP) typically show muscle weakness of the lower extremities, which can be measured with the use of handheld dynamometry(HHD). Objective. The purposes of this study were: (1) to determine test-retest reliability and measurement error of isometric lower-extremity strength measurements in children with CP with the use of HHD and (2) to assess implications for measurement design.Design. A test-retest design was used. Methods. Fourteen children with hemiplegic (n6) or diplegic (n8) spastic CP (Gross Motor Function Classification System levels I–III), ages 7 to 13 years, were assessed for isometric strength on 2 separate days (occasions) with the use of HHD, with 3 trials per muscle group. The intraclass correlation coefficient, standard error of measurement, and smallest detectable difference (SDD) were calculated for different measurement designs. Results. Intraclass correlation coefficient values of single measurements for all muscle groups ranged from .70 to .90, and the SDD was large (30%). Regarding measurement error, the largest source of variability was found for occasion. A 2-occasion mean decreased the SDD by 9% to 14%. For trials, a greater improvement in SDD was found when 2 trials were averaged instead of 3. A measurement design of 2 trials–2 occasions was superior to the often-used approach of 3 trials–1 occasion. Limitations. The small sample size was the major study limitation. Conclusions. Handheld dynamometry is reliable and can be used to detect changes in isometric muscle strength in children with CP when using the mean of at least 2 trials. To further improve reliability, taking the average of 2 occasions on separate days is recommended, depending on group size and muscle group. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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