Psychometric properties of the Vertigo symptom scale – Short form

Wilhelmsen, Kjersti; Strand, Liv Inger; Nordahl, Stein Helge G; Eide, Geir Egil; Ljunggren, Anne Elisabeth

doi:10.1186/1472-6815-8-2

BMC Ear, Nose and Throat Disorders

Table 2 Comparison of factor values. Comparison between factor values on the Vertigo symptom scale – short form in the Norwegian sample by exploratory factor analysis, and the values from similar items by PCA in the full scale (Yardley et al, 1999)^a

From: Psychometric properties of the Vertigo symptom scale – Short form

	Norwegian sample^b n = 509		Mexican sample n = 172		UK hospital sample n = 127		UK primary care sample n= 143
	Balance	Anxiety	Balance	Anxiety	Balance	Anxiety	Balance	Anxiety
4. A feeling that either you, or things around you, are spinning or moving, lasting more than 20 minutes	0.84	-0.18	0.59^d	-0.09	0.71^d	-0.08	0.64^d	-0.08
6. A feeling of being dizzy, disoriented or [or "swimmy]^c, lasting all day	0.81	-0.10	0.71^d	0.08	0.73^d	0.04	0.69^d	0.12
10. Feeling unsteady, about to loose balance, lasting more than 20 minutes	0.80	-0.01	0.69^d	-0.12	0.77^d	-0.03	0.68^d	0.08
8. Unable to stand or walk properly without support, veering or staggering to one side	0.67	0.07	0.40	0.38	0.35	0.27	0.35	0.54
1. A feeling that either you, or things around you, are spinning or moving, lasting less than 20 minutes	0.61	0.09	0.53^e	0.12	0.71^e	-0.13	0.44^e	0.14
15. A feeling of being dizzy disoriented [or "swimmy"]^c, lasting less than 20 minutes	0.60	0.10	0.46^e	0.30	0.70^e	0.17	0.53^e	0.11
13. Feeling unsteady, about to loose balance, lasting less than 20 minutes	0.58	0.14	0.62^e	0.28	0.71^e	0.13	0.58^e	0.10
11. Excessive sweating	0.09	0.82	0.19	0.19	0.12	0.47	0.18	0.60
2. Hot or cold spells	-0.02	0.81	0.25	0.67	0.16	0.59	0.12	0.65
5. Heart pounding or fluttering	-0.04	0.56	0.23	0.58	0.02	0.66	0.09	0.64
9. Difficulty breathing, been short of breath	0.02	0.55	0.08	0.62	0.06	0.53	-0.02	0.72
14. Pains in the heart or chest region	0.05	0.45	0.09	0.67	-0.14	0.52	-0.10	0.52
12. Feeling faint, about to black out	0.43	0.32	0.26	0.02	0.30	0.45	0.06	0.60
3. Nausea [feeling sick]¹, vomiting	0.35	0.31	0.35	0.58	0.36	0.40	0.23	0.56
7. Headache, or feeling of pressure in the head	0.33	0.33	0.23	0.71	0.06	0.52	0.11	0.58

^a Yardley et al: Relationship between physical and psychosocial dysfunction in Mexican patients with vertigo: a cross-cultural validation of the Vertigo symptom scale, J Psychosom Res 1999, 46: 63–74.
^b Exploratory factor analysis with maximum likelihood extraction, oblimin rotation with delta = 0.
^c Not included in the Norwegian version.
^d Compared with the category "several hours" in the original version.
^e Compared with the category "2–20 minutes" in the original version

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ISSN: 1472-6815

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