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Table 2 Item distribution based on two observations for each case – German version of the QoL-AD proxy and QoL-AD NH proxy

From: Item distribution and inter-rater reliability of the German version of the quality of life in Alzheimer’s disease scale (QoL-AD) proxy for people with dementia living in nursing homes

QoL-AD proxy (proxy-proxy perspective), n = 73 QoL-AD NH proxy (proxy-person perspective), n = 73
No. Item response options descriptive No. Item response options descriptive
How do you judge … poor fair good excellent missing mean (±SD) How do you think the resident would judge his/her … poor fair good excellent missing mean (±SD)
1 2 3 4 1 2 3 4
1. … the physical health of the resident? 27 41 67 11 0 2.42 (±0.88) 1. … physical health? 39 49 47 11 0 2.21 (±0.92)
2. … the energy of the resident? 37 39 63 7 0 2.27 (±0.90) 2. … energy? 29 54 59 4 0 2.26 (±0.81)
3. … the mood of the resident? 25 62 55 4 0 2.26 (±0.77) 3. … mood? 27 55 53 10 1 2.32 (±0.86)
4. … the living situation of the resident? 4 23 103 16 0 2.90 (±0.61) 4. … living situation? 23 44 70 9 0 2.45 (±0.83)
5. … the memory of the resident? 72 55 17 2 0 1.65 (±0.74) 5. … memory? 27 38 67 14 0 2.47 (±0.90)
6. … the family of the resident? 36 28 45 37 0 2.57 (±1.12) 6. … family? 23 25 59 37 2 2.76 (±1.01)
7. … the marriage of the resident? 55 14 39 37 1 2.40 (±1.23)          
8. … the friends of the resident? 61 37 35 8 5 1.93 (±0.95) 7. … friends? 34 27 51 25 9 2.49 (±1.06)
9. … his−/herself as a whole? 4 63 72 7 0 2.56 (±0.63) 8. … -self overall? 10 44 72 20 0 2.70 (±0.79)
10. … the ability of the resident to do chores around the house? 93 40 13 0 0 1.45 a (±0.65) 9. … ability to keep busy? 21 46 69 9 1 2.46 (±0.82)
11. … the ability of the resident to do things for fun? 78 36 29 3 0 1.71 (±0.86) 10. … ability to do things for fun? 21 64 55 6 0 2.32 (±0.77)
12. … the money of the resident? 13 38 35 18 42 2.56 (±0.92)          
          11. b… people who work here? 12 25 92 16 1 2.77 (±0.75)
          12. … ability to take care of him−/herself? 43 38 54 11 0 2.23 (±0.96)
          13. … ability to live with others? 19 58 62 7 0 2.39 (±0.77)
          14. … ability to make choices in his/her life? 26 41 62 17 0 2.48 (±0.92)
13. … life as a whole? 8 69 66 1 2 2.42 (±0.61) 15. … life as a whole? 13 60 67 6 0 2.45 (±0.72)
Frequencies of the response options and missing’s in total n 513 545 639 151 50    Frequencies of the response options and missing’s in total n 367 668 939 202 14   
% 27.76 29.49 34.58 8.17 2.63    % 16.87 30.70 43.15 9.28 0.64   
Qol-AD proxy score 1 Rating      25 30.13 (±5.72) c Qol-AD NH proxy score 1 Rating      7 38.76 (±7.84) c
2 Rating      24 30.08 (±5.76) c 2 Rating      4 35.27 (±7.11) c
  1. aItem with floor effect, i.e. mean in the first 20% of the scale (< 1.6)
  2. bThe question begins with: ‘How satisfied do you think the residents feels about the …’
  3. cOnly observations without any missing value were included (Qol-AD proxy: n = 39; Qol-AD NH proxy: n = 62)