Measurement properties of the Dizziness Handicap Inventory by cross-sectional and longitudinal designs

Table 2 Factor structure and item loadings of the DHI-N by exploratory factor analysis (n = 92, sample 1)

Abbreviated item description^a		DHI - Norwegian version^b 2 - factor solution		DHI - Norwegian version^b 3 - factor solution
		Factor I	Factor II	Factor I.	Factor II.	Factor III.
Physical
1	Looking up	- 0.15	0.73	- 0.28	0.65	- 0.25
4	Walking down aisle	0.24	0.28	0.15	0.26	- 0.17
8	Ambitious activities	0.14	0.53	0.13	0.56	- 0.02
11	Quick movements of head	< 0.01	0.58	- 0.09	0.56	- 0.06
13	Turning over in bed	< 0.01	0.55	- 0.08	0.54	0.03
17	Walking down a sidewalk	0.11	0.30	0.10	0.32	> 0.01
25	Bending over	- 0.12	0.76	- 0.14	0.74	- 0.05
Emotional
2	Feel frustrated	0.55	< 0.01	0.51	0.10	- 0.04
9	Leave home alone	0.43	0.24	0.01	0.08	- 0.90
10	Embarrassed in front of others	0.18	< 0.01	0.11	0.06	- 0.10
15	Afraid people think you intoxicated	0.19	0.35	0.54	0.36	- 0.03
18	Concentrate	0.69	< 0.01	0.69	0.14	> 0.01
20	Afraid to stay home alone	0.31	< 0.01	0.03	- 0.06	- 0.57
21	Feel handicapped	0.79	- 0.14	0.80	- 0.05	0.02
22	Stress on relationships	0.74	- 0.39	0.63	- 0.36	- 0.20
23	Depressed	0.61	< 0.01	0.50	- 0.05	- 0.20
Functional
3	Restrict travel	0.61	0.11	0.38	0.05	- 0.44
5	Getting into/out of bed	< 0.01	0.64	- 0.05	0.65	0.28
6	Social activities	0.79	< 0.01	0.68	- 0.05	- 0.21
7	Reading	0.29	0.40	0.39	0.51	0.21
12	Avoid heights	0.14	0.30	0.13	0.31	- 0.01
14	Strenuous house/yard work	0.43	0.29	0.35	0.30	- 0.17
16	Walk by yourself	0.35	0.37	0.05	0.28	- 0.63
19	Walk around in the dark	0.16	0.52	0.15	0.54	- 0.01
24	Job/household responsibilities	0.71	0.10	0.80	0.23	0.14

^aItem loadings are presented according to the abbreviated item description of sub domains of the original version of the DHI questionnaire (physical, emotional and functional subscales). Major loadings for every item ≥ 0.32 are bold face. ^bExploratory factor analysis with Maximum likelihood parameter extraction method with oblique rotation (pattern matrix).

ISSN: 1477-7525