Analysis of vestibular-balance symptoms according to symptom duration: dimensionality of the Vertigo Symptom Scale-short form

Table 3 Factor pattern/structure matrix, commonality, and interfactor correlation in exploratory factor analysis

		Pattern coefficient			Structure coefficient
	Outline of item	F1	F2	F3	F1	F2	F3	h ²
Vertigo-balance subscale
10	Unsteadiness (>20 minutes)	0.868	0.000	0.044	0.887	−0.416	0.413	0.838
4	Vertigo (>20 minutes)	0.742	−0.103	−0.069	0.760	−0.422	0.281	0.742
3	Nausea, vomiting	0.463	0.048	0.182	0.518	−0.227	0.362	0.469
6	Dizziness (all day)	0.427	−0.364	0.093	0.634	−0.592	0.397	0.673
15	Dizziness (<20 minutes)	−0.160	−0.947	0.093	0.317	−0.905	0.344	0.865
1	Vertigo (<20 minutes)	0.081	−0.746	−0.092	0.386	−0.752	0.193	0.781
13	Unsteadiness (<20 minutes)	0.077	−0.672	0.111	0.435	−0.745	0.370	0.665
8	Difficulty in standing or walking	0.372	−0.427	0.016	0.576	−0.604	0.318	0.612
Autonomic-anxiety subscale
9	Shortness of breath	−0.177	−0.062	0.838	0.207	−0.262	0.784	0.693
14	Chest pain	−0.035	0.140	0.693	0.195	−0.078	0.631	0.520
5	Heart pounding	0.169	0.000	0.504	0.382	−0.247	0.575	0.521
12	Feeling faint	0.193	−0.035	0.500	0.421	−0.292	0.594	0.477
2	Chills or hot flushes	0.147	−0.041	0.472	0.366	−0.267	0.548	0.487
11	Excessive sweating	−0.044	−0.127	0.461	0.210	−0.262	0.485	0.511
7	Headache	0.167	−0.099	0.351	0.361	−0.294	0.455	0.391
	Interfactor correlation	F1	F2	F3
	F1
	F2	−0.461
	F3	0.424	−0.337

Exploratory factor analysis used the generalized least square method, direct Oblimin rotation with delta = 0. Factor pattern/structure coefficients of 0.300/0.450 or more, respectively, are in bold. Factor 1 (F1): Vestibular-balance long-duration symptom; Factor 2 (F2): Vestibular-balance short-duration symptom; Factor 3 (F3): Autonomic-anxiety symptom; h ²: commonality.

ISSN: 1477-7525