Table 2

The four factor solution of the principal component analysis

Factor 4.1

Factor 4.2

Factor 4.3

Factor 4.4

Item

Abbreviated item description

Effect of dizziness and unsteadiness on emotion and participation

Specific activities/movements provoking dizziness or unsteadiness

Contextual factors or effort provoking dizziness and unsteadiness

Dependence of others/fear


load

CI-TC

Load

CI-TC

load

CI-TC

load

CI-TC

E 23

feeling depressed

0.788

0.68

E 2

feeling frustrated

0.765

0.60

F 24

job/house responsibilities

0.685

0.71

E 21

feeling handicapped

0.663

0.76

E 10

embarrassed in front of others

0.623

0.38

F 6

restriction of social activities

0.578

0.74

E 22

stressed relationships

0.559

0.65

F 3

restriction of travel

0.477

0.65

E 18

difficulties in concentrating

0.452

0.49

Cronbachs alpha

0.88

P 13

turning over in bed

0.824

0.56

F 5

getting into or out of bed

0.751

0.56

P 1

looking up

0.672

0.49

P 11

quick head movements

0.656

0.52

P 25

bending over

0.589

0.49

F 7

difficulties in reading

0.193

0.265

0.27

0.124

0.169

Cronbachs alpha

0.74

P 17

walking down a sidewalk

0.738

0.59

F 19

walking around in dark

0.715

0.44

E 15

afraid of appearing intoxicated

0.603

0.51

P 8

ambitious activities like sports

0.539

0.63

P 4

walking down a supermarket aisle

0.502

0.48

F 12

avoid heights

0.482

0.48

F 14

strenuous housework

0.412

0.64

Cronbachs alpha

0.80

E 20

afraid to stay home alone

0.759

0.52

E 9

afraid of leaving home alone

0.707

0.70

F 16

walking by yourself

0.512

0.62

Cronbachs alpha

0.77


The table indicates factor loadings, corrected item-total correlations (CI-TC) and Cronbachs alpha correlation coefficients estimated in n = 194. Values of factor loadings are results of the pattern matrix. Bold face indicates loadings with absolute values of 0.6 or more. Loadings < 0.4 are not reported with exception of the values of F7, which has only low loadings. The 4-factor solution explained 54.5% of the variance.

Abbreviations: E indicates emotional subscale; F, functional subscale; P, physical subscale of the Dizziness Handicap Inventory - German version; load indicates factor loading.

Kurre et al. BMC Ear, Nose and Throat Disorders 2010 10:3   doi:10.1186/1472-6815-10-3

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