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Table 2 Scalability, internal consistency and inter-rater reliability of the QUALIKO items and subscales

From: Development and preliminary evaluation of the QUALIKO: an observational quality of life instrument for patients with Korsakoff’s syndrome

  Primary caregiver 1 Primary caregiver 2  
HT / Hi ρ α HT / Hi ρ α ICC (95% CI) /
Κw (95% CI)
A: Care relationship 0.58 0.88 0.87 0.53 0.86 0.85 0.88 (0.81–0.92)
 Rejects help from caregiver 0.62    0.53    0.76 (0.65–0.87)
 Is unfriendly in contacts with caregiver (is angry) 0.65    0.61    0.77 (0.67–0.86)
 Has conflicts with caregiver 0.69    0.62    0.80 (0.70–0.90)
 Accuses others 0.46    0.48    0.69 (0.53–0.86)
 Appreciates help that he or she receives 0.45    0.39    0.67 (0.51–0.84)
 Accepts help 0.50    0.51    0.78 (0.64–0.92)
 Criticizes the daily routine 0.59    0.53    0.75 (0.63–0.87)
B: Autonomy 0.71 0.90 0.79 0.65 0.87 0.77 0.79 (0.68–0.86)
 Indicates to want more independence than he or she can handle 0.77    0.69    0.67 (0.50–0.83)
 Follows directions of caregiver 0.63    0.53    0.29 (0.05–0.52)
 Indicates to want more say about his/her own life than he or she can live up to 0.74    0.72    0.74 (0.59–0.89)
 Accepts the rules of the living community 0.63    0.56    0.68 (0.48–0.87)
C: Positive affect 0.63 0.88 0.89 0.51 0.84 0.84 0.75 (0.64–0.84)
 Has a contented appearance 0.66    0.62    0.68 (0.51–0.85)
 Smiles 0.66    0.64    0.57 (0.41–0.74)
 Mood can be influenced in a positive sense 0.49    0.21    0.33 (0.10–0.57)
 Is cheerful 0.71    0.66    0.63 (0.49–0.78)
 Feels safe 0.52    0.52    0.67 (0.46–0.88)
 Is in a good mood 0.70    0.59    0.71 (0.54–0.89)
 Is capable of enjoying things in daily life 0.64    0.38    0.69 (0.53–0.85)
D: Negative affect 0.47 0.62 0.58 0.49 0.64 0.62 0.72 (0.60–0.82)
 Makes an anxious impression 0.47    0.49    0.71 (0.56–0.86)
 Is sad 0.47    0.49    0.70 (0.56–0.84)
E: Restless tense behavior 0.47 0.70 0.70 0.65 0.82 0.81 0.67 (0.52–0.78)
 Makes restless movements 0.45    0.64    0.52 (0.31–0.72)
 Is restless 0.56    0.73    0.60 (0.43–0.77)
 Has tense body language 0.40    0.56    0.73 (0.62–0.84)
F: Positive self-image 0.32 0.47 0.45 0.58 0.71 0.67 0.59 (0.42–0.72)
 Asks for more help than needed 0.32    0.58    0.58 (0.33–0.83)
 Indicates not being able to do anything 0.32    0.58    0.51 (0.16–0.85)
G: Social relations 0.69 0.88 0.78 0.64 0.84 0.78 0.89 (0.83–0.93)
 Has contact with other residents 0.76    0.74    0.75 (0.63–0.87)
 Responds positively when approached 0.46    0.58    0.62 (0.51–0.84)
 Takes care of other residents 0.70    0.58    0.75 (0.64–0.87)
 Is on friendly terms with one or more residents 0.72    0.65    0.75 (0.60–0.89)
H: Social isolation 0.47 0.70 0.70 0.65 0.82 0.81 0.62 (0.46–0.74)
 Openly rejects contact with others 0.45    0.64    0.59 (0.39–0.78)
 Is rejected by other residents 0.56    0.73    0.64 (0.52–0.76)
 Indicates to miss contact with family 0.40    0.56    0.69 (0.54–0.84)
I: Feeling at home 0.52 0.78 0.78 0.49 0.80 0.77 0.69 (0.55–0.79)
 Indicates that he or she is bored 0.36    0.39    0.44 (0.21–0.68)
 Indicates feeling locked up 0.62    0.56    0.70 (0.54–0.87)
 Wants to get off the ward 0.58    0.57    0.68 (0.51–0.84)
 Feels at home on the ward 0.51    0.43    0.74 (0.57–0.90)
J: Meaningful activity 0.51 0.81 0.79 0.43 0.78 0.73 0.81 (0.72–0.88)
 Enjoys going to day care 0.54    0.41    0.77 (0.56–0.99)
 Is productive at day care 0.69    0.55    0.53 (0.26–0.79)
 Participates in activities in free time 0.42    0.37    0.74 (0.62–0.85)
 Enjoys helping with chores in the living community 0.50    0.42    0.75 (0.64–0.87)
 Has fun at the day care 0.57    0.47    0.58 (0.32–0.85)
 Finds things to do without help from others 0.41    0.42    0.83 (0.74–0.93)
  1. HT = Loevinger’s scalability coefficient for the subscale; Hi = Loevinger’s scalability coefficient for the item; ρ = Sijtsma and Molenaar’s rho; α = Cronbach’s alpha; ICC = intraclass correlation coefficient (two-way random effects model, single measures, absolute agreement); Κw = quadratic weighted kappa; CI = confidence interval