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Assessment of capacity for myoelectric control: a new Rasch-built measure of prosthetic hand control
Örebro University Hospital, Örebro, Sweden; Karolinska Institute, Stockholm, Sweden.ORCID-id: 0000-0003-4247-2236
Umeå University, Umeå, Sweden.
Umeå University, Umeå, Sweden.
Karolinska Institute, Stockholm, Sweden.
2005 (engelsk)Inngår i: Journal of Rehabilitation Medicine, ISSN 1650-1977, E-ISSN 1651-2081, Vol. 37, nr 3, s. 166-71Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

OBJECTIVE: To report the results from a Rasch rating scale analysis of the Assessment of Capacity for Myoelectric Control (ACMC) implemented to evaluate internal scale validity, person response validity, separation reliability, targeting and responsiveness of the measures over time.

DESIGN: Longitudinal data (18 months) from a prospective study of development of capacity for myoelectric control in children and adults were used for the analysis.

PATIENTS: A consecutive sample of 75 subjects (43 males, 32 females) with upper limb reduction deficiency or amputation and myoelectric prosthetic hands referred for occupational therapy from September 2000 to March 2002. Participants' ages ranged from 2 to 57 years.

METHODS: Outcome measure was the ACMC. Occupational therapists completed 210 assessments at an arm prosthesis centre in Sweden. A two-faceted rating scale analysis of the data was performed.

RESULTS: All 30 ACMC items and 96.2% of participants demonstrated goodness-of-fit to the rating scale model for the ACMC. Separation and SE values suggested adequate reliability of the item and person estimates.

CONCLUSION: The items demonstrated internal scale validity and the participants demonstrated person response validity. The ACMC was well targeted and sensitive enough to detect expected change in ability.

sted, utgiver, år, opplag, sider
2005. Vol. 37, nr 3, s. 166-71
HSV kategori
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URN: urn:nbn:se:oru:diva-27826DOI: 10.1080/16501970410024280ISI: 000229479000007PubMedID: 16040474OAI: oai:DiVA.org:oru-27826DiVA, id: diva2:609005
Tilgjengelig fra: 2013-03-04 Laget: 2013-03-04 Sist oppdatert: 2018-01-11bibliografisk kontrollert
Inngår i avhandling
1. Upper limb reduction deficiencies in Swedish children: classification, prevalence and function with myoelectric prostheses
Åpne denne publikasjonen i ny fane eller vindu >>Upper limb reduction deficiencies in Swedish children: classification, prevalence and function with myoelectric prostheses
2004 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Upper limb reduction deficiency (ULRD) is a rare condition that has been known ever since the 6th century B.C. This is a lifelong deficiency which in an afflicted child can lead to practical limitations, social restrictions and physical problems. The overall aim of this research was to increase the knowledge about children with upper limb reduction deficiencies from three perspectives: the deficiencies themselves, the use of prostheses and the well being of the affected children. To validate information regarding ULRD in the Swedish Register for Congenital Malformations (SRCM), all infants reported to this register during 1973-1987 were re-classified according to a more detailed classification. The result was compared with a clinic-based register at the Limb Deficiency and Arm Prostheses Centre in Örebro, Sweden. The findings indicate that SRCM, with its calculated underestimation of 6%, can be used for studying the prevalence of ULRD in Sweden. However, as SRCM is a surveillance register, the quality of some information seems to be low, making detailed description of cases difficult. Use of the population register data for clinical purposes could therefore result in lower validity. Additional information and follow-up of specific cases are therefore recommended.

The presence of scoliosis and trunk asymmetry was studied in 60 persons with transverse ULRD. Nineteen persons (31%) had a scoliosis of between 10 and 19º and 30 persons had minor curves of between 5 and 10º. There was a significant correlation between leg length inequality and side of the convexity, with the convexity directed towards the side of the shorter leg in 21 of 28 persons. This indicates that children with transverse ULRD may have a transient scoliosis of postural origin of no clinical significance.

A new observation-based test, the Assessment of Capacity for Myoelectric Control (ACMC), which measures a person’s capacity to control a myoelectric prosthetic hand during the performance of ordinary daily tasks, was developed. Occupational therapists completed 210 assessments of 75 persons. Rasch rating scale analysis was used for validation and reliability estimations. The results demonstrate internal scale and person response validity.

The external reliability of ACMC was established by scorings from three raters with different degrees of experience on 27 videotapes of client performance. The major finding in this study was that in order to obtain reliable measures from the ACMC the raters have to have some experience of this group of clients. Until the ACMC can adjust for rater severity, the same rater should perform the ACMC when it is used for follow-up or clinical trials.

In a study of 62 children we found that, overall, children with ULRD who have been fitted with a myoelectric prosthetic hand are just as well adjusted psychosocially as their able-bodied peers. There are indications, however, of social stigmata related to the deficiency which have to be considered differently in boys and girls. Most children who have been provided with a myoelectric prosthesis at an early age continue to use the prosthesis.

sted, utgiver, år, opplag, sider
Stockholm: Karolinska institutet, 2004. s. 43
Emneord
children, upper limb, deficiency, register validation, scoliosis, arm prosthesis, measurement, occupational therapy, psychopathology, depression
HSV kategori
Forskningsprogram
Medicin
Identifikatorer
urn:nbn:se:oru:diva-27809 (URN)91 -7140 - 091 - 5 (ISBN)
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(svensk)
Opponent
Veileder
Tilgjengelig fra: 2013-03-04 Laget: 2013-03-01 Sist oppdatert: 2017-10-17bibliografisk kontrollert

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