Skip to main content

Table 2 Summary statistics

From: Developing a dementia-specific health state classification system for a new preference-based instrument AD-5D

  N (284) % missing Mean Std. Dev. Floor effect (% min score) Ceiling effect (% max score) Factor loading Cronbach's alphaa
Item 4 Living situation 256 9.86 1.754 0.839 8.59 17.19 0.341 0.843
Item 6 Family 259 8.80 1.931 0.828 7.72 23.17 0.683 0.852
Item 7 Staff 247 13.03 1.899 0.766 4.45 20.24 0.380 0.850
Item 8 Friends 237 16.55 1.814 0.797 7.17 16.88 0.590 0.844
Item 12 Live with others 239 15.85 1.703 0.820 8.79 14.23 0.465 0.840
Item 13 Make choices 229 19.37 1.729 0.820 9.17 14.41 0.398 0.837
Item 1 Physical health 276 2.82 1.634 0.849 12.32 11.96 0.814 0.846
Item 2 Energy 273 3.87 1.516 0.862 14.29 10.26 0.626 0.839
Item 9 Keep busy 243 14.44 1.593 0.864 13.17 11.93 0.757 0.839
Item 10 Do fun things 238 16.20 1.542 0.917 15.13 14.29 0.757 0.836
Item 11 Self-care 243 14.44 1.765 0.822 7.41 17.28 0.396 0.843
Item 3 Mood 261 8.10 1.586 0.793 9.96 9.20 - 0.842
Item 5 Memory 263 7.39 1.430 0.866 16.35 8.75 - 0.843
  1. Abbreviations: Std. Dev. standard deviation, min minimum, max maximum
  2. aCronbach’s alpha for individual item is calculated as the overall alpha when the item is excluded from the pool