Background: Activities and participation domains are affected in people with vestibular disorders; however, specialized outcome measures for evaluating activities and participation according to the International Classification of Functioning, Disability and Health (ICF) do not exist.
Purpose: To develop and validate the Vestibular Activities and Participation (VAP) measure for people with vestibular disorders according to the ICF.
Methods: A list of activities and participation candidate items were generated and included in a survey. The survey was then sent to a panel of vestibular experts and agreement was obtained on the items to include in the VAP using the Delphi technique. The psychometric properties of the VAP were established including test-retest reliability; minimum detectable change at 95% confidence level (MDC95), concurrent validity with the World Health Organization Disability Assessment Schedule II (WHODAS II); convergent validity with the Dizziness Handicap Inventory (DHI), and discriminant validity. The test-retest reliability of the VAP total score was estimated using the Intra Class Correlation Coefficient (ICC), model (3,1) and the 95% confidence interval (CI). Agreement per-item was estimated using Cohens kappa statistics. Concurrent and convergent validity were examined using the Spearman correlation coefficient (rho). Discriminant validity was established using a generalized linear model (GLM).
Results: Fifty five activities and participation items were generated in which 32 of them had 70% or greater agreement for inclusion in the VAP. The test-retest reliability of the VAP total score was excellent (ICC=.95), (CI=.91-.97). Un-weighted kappa (.41-.80) and weighted kappa (.58-.94) were good to excellent. The VAP had strong correlation (rho=.7, p<.05) with the WHODAS II and moderate to strong correlations (rho=.54-.74) with the DHI subscale and total scores. The MDC95 was .58. After adjustment for age, gender and self-reported imbalance were independent predictors of the transformed VAP total score.
Conclusion: The VAP measure was developed to examine the disabling effect of vestibular disorders on peoples activities and participation based on the ICF. The VAP demonstrated excellent reliability and was validated with external instruments.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-02042011-190431 |
| Date | 04 May 2011 |
| Creators | Alghwiri, Alia A |
| Contributors | Gregory F. Marchetti, Joan C. Rogers, Susan L. Whitney, Patrick J. Sparto, Carol E. Baker, Joseph M. Furman |
| Publisher | University of Pittsburgh |
| Source Sets | University of Pittsburgh |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.pitt.edu/ETD/available/etd-02042011-190431/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Pittsburgh or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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