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Table 4 Scalability and internal consistency from six QUALIDEM subscales for people with very severe dementia

From: Scalability and internal consistency of the German version of the dementia-specific quality of life instrument QUALIDEM in nursing homes – a secondary data analysis

FAST = 7 InDemA   STI-D   Leben-QD I   Total  
(n = 90)   (n = 116)   (n = 50)   (n = 256)
Item Nr. Subscale (items) Scale-H 1(item H i) Rho Alpha Scale-H 1(item H i) Rho Alpha Scale-H 1(item H i) Rho Alpha Scale-H 1(item H i) Rho Alpha
A. Care relationship 0.60 0.78 0.75 0.38 0.53 0.57 0.60 0.80 0.73 0.47 0.73 0.67
7. Is angry 0.60    0.50    0.61    0.54   
14. Has conflicts with nursing assistants 0.66    0.44    0.63    0.54   
31. Accepts help 0.53    0.19    0.53    0.35   
B. Positive affect 0.57 0.81 0.81 0.64 0.86 0.86 0.79 0.90 0.91 0.65 0.86 0.85
5. Radiates satisfaction 0.66    0.68    0.86    0.70   
8. Is capable of enjoying things in daily life 0.52    0.67    0.75    0.64   
21. Has a smile around the mouth 0.60    0.64    0.74    0.65   
40. Mood can be influenced in positive sense 0.51    0.57    0.81    0.59   
C. Negative affect 0.38 0.50 0.49 0.46 0.62 0.57 0.10 0.25 0.15 0.36 0.50 0.47
6. Makes an anxious impression 0.38    0.46    0.10    0.36   
23. Accepts help 0.38    0.46    0.10    0.36   
D. Restless tense behavior 0.41 0.66 0.66 0.32 0.57 0.56 0.43 0.73 0.66 0.37 0.59 0.62
2. Makes restless movements 0.53    0.37    0.56    0.47   
19. Is restless 0.49    0.43    0.45    0.45   
22. Has tense body language 0.21    0.14    0.27    0.18   
F. Social relations 0.33 0.58 0.53 0.41 0.59 0.58 0.10 0.18 0.19 0.33 0.53 0.52
3. Has contact with other residents 0.33    0.46    0.18    0.36   
12. Responds positively when approached 0.28    0.41    0.14    0.34   
25. Cuts himself/herself off from environment 0.37    0.36    0.00    0.30   
G. Social isolation 0.20 0.42 0.41 0.17 0.36 0.36 0.28 0.47 0.51 0.20 0.42 0.41
16. Is rejected by other residents 0.26    0.20    0.41    0.25   
20. Openly rejects contact with others 0.18    0.24    0.22    0.21   
32. Calls out 0.16    0.08    0.20    0.13   
  1. 1in bold.
  2. Scale-H, Loevingers coefficient of homogeneity and scalability are classified as follow: 0.30 – 0.39 indicates a weak scale, 0.40 – 0.50 indicates moderate scalability and > 0.50 indicates strong scale.