Canadian occupational performance measure: Impact of blinded parent-proxy ratings on outcome

Wallen, Margaert A. and Ziviani, Jenny M. (2012) Canadian occupational performance measure: Impact of blinded parent-proxy ratings on outcome. Canadian Journal of Occupational Therapy - Revue Canadienne D Ergotherapie, 79 1: 7-14. doi:10.2182/cjot.2012.79.1.2


Author Wallen, Margaert A.
Ziviani, Jenny M.
Title Canadian occupational performance measure: Impact of blinded parent-proxy ratings on outcome
Journal name Canadian Journal of Occupational Therapy - Revue Canadienne D Ergotherapie   Check publisher's open access policy
ISSN 0008-4174
1911-9828
Publication date 2012-02-01
Sub-type Article (original research)
DOI 10.2182/cjot.2012.79.1.2
Open Access Status Not yet assessed
Volume 79
Issue 1
Start page 7
End page 14
Total pages 8
Place of publication Ottawa, ON, Canada
Publisher Canadian Association of Occupational Therapists
Language eng
Subject 3609 Occupational Therapy
Abstract Background. There is potential for unintended effects on intervention outcome when using the Canadian Occupational Performance Measure (COPM) in intervention studies. Purpose. To determine the effect of blinded parent-proxy ratings of the COPM on outcomes at later endpoints. Methods. Data were drawn from a randomized trial of 50 children with hemiplegic cerebral palsy aged 19 months to seven years. Outcomes were measured at baseline, post-intervention, and six months. Parents of 36 children were randomly allocated to complete six-month COPM proxy ratings blinded or unblinded to previous ratings. A group of 32 parents rated the sixmonth COPM blinded and then re-rated it after access to previous ratings. Findings. There was no statistically significant difference in ratings between those completing the COPM blinded compared to unblinded. Implications. The COPM should continue to be rated blinded at post-intervention endpoints in the absence of further research to the contrary.
Formatted abstract
Background. There is potential for unintended effects on intervention outcome when using the Canadian Occupational Performance Measure (COPM) in intervention studies.

Purpose.
To determine the effect of blinded parent-proxy ratings of the COPM on outcomes at later endpoints.

Methods.
Data were drawn from a randomized trial of 50 children with hemiplegic cerebral palsy aged 19 months to seven years. Outcomes were measured at baseline, post-intervention, and six months. Parents of 36 children were randomly allocated to complete six-month COPM proxy ratings blinded or unblinded to previous ratings. A group of 32 parents rated the six-month COPM blinded and then re-rated it after access to previous ratings.

Findings.
There was no statistically significant difference in ratings between those completing the COPM blinded compared to unblinded.

Implications.
The COPM should continue to be rated blinded at post-intervention endpoints in the absence of further research to the contrary.
Keyword Blinded
Canadian Occupational Performance Measure (COPM)
Cerebral palsy
Occupational therapy
Outcome assessment
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Health and Rehabilitation Sciences Publications
 
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