Table 4.
The three factor solution of the principal component analysis
| Factor 3.1: | Factor 3.2: | Factor 3.3: | ||||||
|---|---|---|---|---|---|---|---|---|
| Item | Abbreviated item description | Item mean (SD) | Effect of dizziness and unsteadiness on emotion and participation | Specific activities/movements or effort provoking dizziness or unsteadiness | self-perceived walking ability and feeling of postural stability in relation to contextual factors |
|||
| load | CI-TC | load | CI-TC | load | CI-TC | |||
| E 23 | feeling depressed | 1.8 (1.5) | 0.792 | 0.68 | ||||
| E 2 | feeling frustrated | 2.4 (1.4) | 0.757 | 0.59 | ||||
| E 21 | feeling handicapped | 2.3 (1.5) | 0.653 | 0.76 | ||||
| F 24 | job/house responsibilities | 2.0 (1.6) | 0.652 | 0.71 | ||||
| E 10 | embarrassed in front of others | 1.6 (1.9) | 0.622 | 0.38 | ||||
| F 6 | restriction of social activities | 2.1 (1.7) | 0.567 | 0.74 | ||||
| E 22 | stressed relationships | 1.3 (1.6) | 0.563 | 0.65 | ||||
| F 3 | restriction of travel | 2.2 (1.7) | 0.463 | 0.65 | ||||
| E 18 | difficulties in concentrating | 1.9 (1.5) | 0.397 | 0.49 | ||||
| Cronbachs alpha | 0.88 | |||||||
| P 13 | turning over in bed | 1.7 (1.6) | 0.747 | 0.52 | ||||
| P 11 | quick head movements | 2.9 (1.5) | 0.726 | 0.55 | ||||
| P 1 | looking up | 2.3 (1.6) | 0.707 | 0.48 | ||||
| F 5 | getting into or out of bed | 1.6 (1.6) | 0.683 | 0.56 | ||||
| P 25 | bending over | 2.0 (1.7) | 0.618 | 0.48 | ||||
| P 8 | ambitious activities like sports | 2.3 (1.7) | 0.439 | 0.56 | ||||
| F 14 | strenuous housework | 2.1 (1.6) | 0.410 | 0.60 | ||||
| F 7 | difficulties in reading | 1.5 (1.6) | 0.200 | 0.253 | 0.35 | 0.209 | ||
| Cronbachs alpha | 0.80 | |||||||
| P 17 | walking down a sidewalk | 1.1 (1.5) | 0.713 | 0.58 | ||||
| F 19 | walking around in dark | 1.7 (1.7) | 0.701 | 0.42 | ||||
| F 16 | walking by yourself | 1.2 (1.5) | 0.623 | 0.61 | ||||
| E 15 | afraid of appearing intoxicated | 1.4 (1.7) | 0.580 | 0.51 | ||||
| E 9 | afraid of leaving home alone | 1.0 (1.3) | 0.572 | 0.58 | ||||
| P 4 | walking down a supermarket aisle | 1.8 (1.7) | 0.553 | 0.51 | ||||
| F 12 | avoid heights | 2.3 (1.8) | 0.543 | 0.43 | ||||
| E 20 | afraid to stay home alone | 0.5 (1.1) | 0.416 | 0.44 | ||||
| Cronbachs alpha | 0.79 | |||||||
The table indicates item statistics, 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 3-factor solution explained 49.2% 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.