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Table 3 Descriptive statistics and reliability estimates a

From: Development and preliminary evaluation of a quality of life measure targeted at dementia caregivers

Scale No. of items Mean (SD) Observed minimum % Scoring at floor (0 points) % Scoring at ceiling (100 points) Cronbach's alpha Test-retest reliability
(ICC, 95% CI) b
Assistance in IADLS c 13 21.6 (21.7) 0 20.0 0.5 0.88 0.86
(0.73 – 0.99)
Assistance in ADLS d 5 63.0
(36.2)
0 12.5 26.5 0.93 0.86
(0.71 – 1.00)
Personal Time 4 45.2
(23.2)
0 2.0 0.0 0.78 0.63
(0.34 – 0.92)
Role Limitations Due to Caregiving 5 50.7
(24.2)
0 1.0 1.5 0.83 0.53
(0.20 – 0.86)
Family Involvement 6 52.6
(26.7)
0 1.0 6.5 0.86 0.74
(0.53 – 0.96)
Demands of Caregiving 7 50.9
(23.2)
3.6 0.0 2.0 0.86 0.72
(0.50 – 0.95)
Worry 9 50.2
(20.3)
2.8 0.0 0.0 0.82 0.53
(0.17 – 0.89)
Caregiver Feelings 20 66.0
(20.5)
1.3 0.0 1.0 0.94 0.65
(0.33 – 0.97)
Spirituality and Faith 3 63.5
(34.8)
0 12.1 26.1 0.92 0.83
(0.65 – 1.00)
Benefits of Caregiving 8 68.9
(23.0)
3.1 0.0 5.5 0.89 0.89
(0.79 – 0.99)
  1. a Higher values mean better functioning and well-being or need for less assistance from caregiver. n = 199 – 200 caregivers except for test-retest reliability
  2. b n = 38 caregivers with one point or less change in caregiver experience and 21 days or less (mean = 14.9 days, SD = 3.2) between baseline and retest.
  3. c IADLS = Instrumental Activities of Daily Living
  4. d ADLS = Activities of Daily Living