Test-retest reliability of the Dutch version of the Dizziness Handicap Inventory
L. Vereeck*,**, S. Truijen***, F. Wuyts**,**** and P. H. Van de Heyning*****
*Division of Neuro- and Psychomotor Physical Therapy, Department of Health Care, University CollegeAntwerpen,Van Aertselaerstraat 31, 2170 Merksem, Belgium; **Vestibular Function Laboratory, Department of Otorhinolaryngology, Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium; ***Department of Health Care, University College Antwerpen, Van Aertselaerstraat 31, 2170 Merksem (Antwerpen), Belgium; ****Faculty of Science (Department of Biomedical Physics), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium; *****Faculty of Medicine, University ofAntwerp, Universiteitsplein 1, 2610 Wilrijk (Antwerpen), Belgium
Dizziness; unsteadiness; disability; handicap; questionnaire
75 - 80
Test-retest reliability of the Dutch version of the Dizziness Handicap InventoryIn the last fifteen years the Dizziness Handicap Inventory (DHI) has gained wide acceptance as a useful measure of handicap resulting from dizzi- ness and unsteadiness. The objective of this study was to calculate measurement error and test-retest reliability of the Dutch version of the DHI. The translation into Dutch was performed according to a double translation method. One hun- dred and six patients with balance problems (range 26-78 years), scheduled for vestibular rehabilitation, completed the DHI on two occasions on the same day. The test-retest reliability was excellent, with Intraclass Correlation Coefficients ranging from 0.94 to 0.99 for DHI sub-scores and DHI total score. Most weighted kappa values ( kW) exceeded 0.80 indicating substantial item per item test-retest reliability. Over 80% agreement was noted for all items except for item 8 (74%). Item 8 asks whether the subject feels dizzy or unsteady while doing ambitious activities like sports, dancing and household activities. Consequently measurement errors were calculated, suggesting that, after an intervention, the pre- treatment DHI total score should at least decrease with 12 points (lower bound 99% confidence interval for a true change) before the intervention could be said to be effective for an individual patient. Based on these data, the Dutch version of the DHI showed itself to be a highly reliable instrument to assess the self-perceived handicap imposed by vestibular system diseases.
Vol. 2, 2006, 2nd trimester

Test-retest reliability of the Dutch version of the Dizziness Handicap Inventory