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Table 2 Correlation of perseverance time with related measures for assessment of construct validity and responsiveness

From: Perseverance time of informal caregivers for people with dementia: construct validity, responsiveness and predictive validity

 

Construct validitya

Responsivenessb

Study A

Study B

Pooled data

Study A

CSI

−0.45c

−0.40c

−0.42c

0.27d

SRB

−0.62c

−0.36c

−0.50c

0.28d

CarerQol-7D

0.32c

0.46c

0.39c

N/A

CarerQol-VAS

0.23c

0.28c

0.25c

−0.23d

Objective burden

−0.24c

−0.28c

−0.26c

0.10

IC VAS health

0.19c

0.15

0.17c

−0.19

PwD VAS health

0.10

−0.01

0.05

N/A

  1. Abbreviations: CarerQol Care-related Quality of Life instrument, VAS Visual analogue scale, IC Informal caregiver, PwD People with dementia, SRB Self-rated Burden scale, CSI Caregiver Strain Index, N/A Not applicable, because these measures were not included in the follow-up measurement
  2. a Correlations between actual scores
  3. b Correlations between change scores over time. Change in perseverance time was used as a positive or negative difference in number of ordered answering categories between follow-up and baseline. Change in other scores is used as continuous difference between follow-up and baseline
  4. c p < 0.05
  5. d p < 0.01
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Alzheimer's Research & Therapy

ISSN: 1758-9193