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Table 3 Scalability and internal consistency from nine QUALIDEM subscales for people with mild to 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 2 - 6 InDemA   STI-D   Leben-QD I   Total  
(n = 59)   (n = 222)   (n = 97)   (n = 378)
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 0.51 0.87 0.85 0.41 0.80 0.80 0.41 0.81 0.80 0.42 0.81 0.81
4. Rejects help from nursing assistants 0.61    0.48    0.40    0.48   
7. Is angry 0.57    0.50    0.44    0.49   
14. Has conflicts with nursing assistants 0.61    0.49    0.54    0.52   
17. Accuses others 0.39    0.32    0.29    0.32   
24. Appreciates help he or she receives 0.53    0.37    0.35    0.39   
31. Accepts help 0.55    0.41    0.43    0.43   
33. Criticizes the daily routine 0.29    0.29    0.40    0.31   
B. Positive Affect 0.77 0.94 0.93 0.65 0.91 0.91 0.60 0.88 088 0.65 0.91 0.90
1. Is cheerful 0.79    0.70    0.66    0.67   
5. Radiates satisfaction 0.79    0.71    0.60    0.69   
8. Is capable of enjoying things in daily life 0.80    0.59    0.63    0.62   
10. Is in a good mood 0.81    0.73    0.65    0.71   
21. Has a smile around the mouth 0.75    0.67    0.62    0.66   
40. Mood can be influenced in positive sense 0.69    0.52    0.43    0.52   
C. Negative Affect 0.48 0.68 0.65 0.58 0.76 0.75 0.43 0.65 0.62 0.53 0.73 0.72
6. Makes an anxious impression 0.47    0.51    0.40    0.49   
11. Is sad 0.56    0.64    0.47    0.59   
23. Cries 0.40    0.57    0.43    0.52   
D. Restless tense behavior 0.42 0.68 0.66 0.43 0.70 0.66 0.53 0.76 0.74 0.45 0.69 0.68
2. Makes restless movements 0.46    0.48    0.60    0.51   
19. Is restless 0.45    0.50    0.60    0.51   
22. Has tense body language 0.34    0.29    0.37    0.32   
E. Positive self-image 0.27 0.55 0.49 0.47 0.70 0.71 0.40 0.64 0.63 0.42 0.67 0.67
27. Indicates he or she would like more help 0.20    0.41    0.33    0.36   
35. Indicates not being able to do anything 0.40    0.52    0.54    0.50   
37. Indicates feeling worthless 0.23    0.46    0.34    0.41   
F. Social relations 0.57 0.83 0.80 0.41 0.74 0.72 0.38 0.70 0.70 0.43 0.77 0.73
3. Has contact with other residents 0.65    0.46    0.40    0.47   
12. Responds positively when approached 0.47    0.48    0.31    0.44   
18. Takes care of other residents 0.55    0.35    0.47    0.42   
25. Cuts himself/herself off from environment 0.57    0.29    0.22    0.33   
29. Is on friendly terms with one or more residents 0.57    0.42    0.42    0.45   
34. Feels at ease in the company of others 0.57    0.48    0.46    0.48   
G. Social Isolation 0.12 0.28 0.26 0.30 0.55 0.54 0.29 0.52 0.50 0.28 0.53 0.52
16. Is rejected by other residents 0.21    0.39    0.41    0.35   
20. Openly rejects contact with others 0.16    0.33    0.17    0.29   
32. Calls out −0.02    0.20    0.29    0.21   
H. Feeling at home 0.35 0.68 0.64 0.30 0.59 0.60 0.35 0.64 0.63 0.31 0.62 0.61
13. Indicates that he or she is bored 0.39    0.25    0.23    0.26   
28. Indicates feeling locked up 0.26    0.33    0.44    0.34   
36. Feels at home on the ward 0.34    0.32    0.28    0.30   
39. Wants to get off the ward 0.40    0.30    0.43    0.34   
I. Having something to do 0.28 0.37 0.36 0.18 0.18 0.23 0.14 0.24 0.22 0.18 0.23 0.24
26. Finds things to do without help from others 0.28    0.18    0.14    0.18   
38. Enjoys helping with chores on the ward 0.28    0.18    0.14    0.18   
  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.