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Table 4 Inter-rater reliability results for the German version of the QUALIDEM

From: Item distribution, internal consistency and inter-rater reliability of the German version of the QUALIDEM for people with mild to severe and very severe dementia

Inter-rater reliability: Subscales and items FAST 2 – 6 (n = 55) FAST 7 (n = 36)
poa ICCb kc 95 % CI poa ICCb kc 95 % CI
A. Care relationship   0.92 (0.91) e   0.89 – 0.95 (0.87 – 0.94) e   0.79 (0.78) e   0.68 – 0.87 (0.67 – 0.87) e
  4 Rejects help from nursing assistants 0.61   0.50 0.40 – 0.59     
  7 Is angry 0.60   0.52 0.42 – 0.60 0.63   0.49 0.35 – 0.62
  14 Has conflicts with nursing assistants 0.56   0.38 0.29 – 0.47 0.66   0.49 0.34 – 0.63
  17 Accuses others 0.63   0.52 0.42 – 0.61     
  24 Appreciates help that he or she receives 0.55   0.42 0.31 – 0.52     
  31 Accepts help 0.62d   0.38d 0.23 – 0.51 0.67d   0.41d 0.27 – 0.53
  33 Criticizes the daily routine 0.67d   0.38d 0.20 – 0.53     
B. Positive affect   0.91   0.87 – 0.94   0.82   0.73 – 0.90
  1 Is cheerful 0.49   0.39 0.31 – 0.46     
  5 Radiates satisfaction 0.52   0.38 0.29 – 0.47 0.44   0.29 0.19 – 0.38
  8 Is capable of enjoying things in daily life 0.55   0.40 0.29 – 0.50 0.57   0.46 0.32 – 0.59
  10 Is in good mood 0.54   0.44 0.36 – 0.52     
  21 Has a smile around the mouth 0.51   0.41 0.33 – 0.48 0.61   0.53 0.39 – 0.66
  40 Mood can be influenced in positive sense 0.48   0.34 0.24 – 0.43 0.46   0.32 0.19 – 0.43
C. Negative affect   0.91 (0.89) e   0.87 – 0.94 (0.84 – 0.93) e   0.64   0.49 – 0.77
  6 Makes an anxious impression 0.61   0.50 0.39 – 0.59 0.56   0.48 0.37 – 0.58
  11 Is sad 0.57   0.47 0.37 – 0.55     
  23 Cries 0.77d   0.58d 0.46 – 0.69 0.83d   0.54d 0.28 – 0.75
D. Restless tense behavior   0.95   0.92 – 0.97   0.91   0.85 – 0.95
  2 Makes restless movements 0.64   0.53 0.43 – 0.62 0.65   0.58 0.47 – 0.67
  19 Is restless 0.55   0.43 0.34 – 0.52 0.62   0.54 0.41 – 0.65
  22 Has tense body language 0.68   0.58 0.45 – 0.68 0.53   0.44 0.31 – 0.55
E. Positive self-image   0.92   0.88 – 0.95     
  27 Indicates he or she would like more help 0.77d   0.45d 0.27 – 0.59     
  35 Indicates not being able to do anything 0.66d   0.45d 0.32 – 0.57     
  37 Indicates feeling worthless 0.74d   0.57d 0.48 – 0.65     
F. Social relations   0.93 (0.93) e   0.89 – 0.95 (0.90 – 0.95) e   0.83   0.74 – 0.90
  3 Has contact with other residents 0.60   0.46 0.34 – 0.57 0.59   0.47 0.35 – 0.56
  12 Responds positively when approached 0.55d   0.37d 0.26 – 0.46 0.59d   0.41d 0.25 – 0.56
  18 Takes care for other residents 0.69   0.57 0.47 – 0.66     
  25 Cuts himself/herself off from environment 0.64   0.51 0.41 – 0.60 0.79d   0.40d 0.14 – 0.59
  29 Is on friendly terms with one or more residents 0.68   0.60 0.51 – 0.69     
  34 Feels at ease in the company of others 0.44   0.31 0.22 – 0.39     
G. Social isolation   0.95   0.92 – 0.97   0.84   0.75 – 0.90
  16 Is rejected by other residents 0.68d   0.49d 0.36 – 0.60 0.75d   0.44d 0.20 – 0.63
  20 Openly rejects contact with others 0.55   0.45 0.36 – 0.52 0.64d   0.37d 0.18 – 0.52
  32 Calls out 0.85d   0.62d 0.44 – 0.76 0.82   0.65 0.46 – 0.80
H. Feeling at home   0.91   0.87 – 0.94     
  13 Indicates that he or she is bored 0.70d   0.40d 0.26 – 0.52     
  28 Indicates feeling locked up 0.85d   0.52d 0.31 – 0.67     
  36 Feels at home on the ward 0.62   0.54 0.44 – 0.63     
  39 Wants to get off the ward 0.82d   0.52d 0.36 – 0.65     
I. Having something to do   0.96   0.94 – 0.97     
  26 Finds things to do without help from others 0.69   0.61 0.51 – 0.70     
  38 Enjoys helping with chores on the ward 0.70d   0.55d 0.43 – 0.66     
  Remaining items to be used in future research         
  9 Does not want to eat 0.63   0.47 0.36 – 0.58 0.63   0.52 0.37 – 0.65
  15 Enjoys meals 0.58   0.49 0.39 – 0.58 0.54   0.43 0.29 – 0.55
  30 Likes to lie down (in bed) 0.55   0.44 0.35 – 0.53 0.59   0.42 0.27 – 0.56
  1. aOverall proportion of agreement (the ratio of exact agreement between raters to the total number of ratings)
  2. bICC intra-class correlation coefficient
  3. cKappa values
  4. dItems with floor effects (mean < 1.2) or ceiling effects (mean > 4.8), see Table 3
  5. eICC values and corresponding 95 % CIs when excluding items with floor or ceiling effects