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Table 3 Linear regression models showing the independent variables that best explain the variation in HRQoL (EQ5D index) and burden (Negative impact scale COPE index)

From: Factors associated with health-related quality of life and burden on relatives of older people with multi-morbidity: a dyadic data study

MODEL A: Dependent variable HRQoL (n = 227)
B 95% CI for B β p R2 Adj R2
Independent variables   Lower Upper     
 Relatives working/studying (0 = no;1 = yes) .139 .074 .204 .275 <.001*   
 Care interaction perceived by relatives (1 = never to 6 = always) .027 −.004 .057 .117 .086   
 Quality of support perceived by older people (4 = never to 16 = always) .011 −.002 .023 .112 .087   
 Burden perceived by relatives (7 = never to 28 = always) −.007 −.016 .001 −.111 .093   
 Explained variance       .112 .096
MODEL B: Dependent variable Burden (n = 255)
B 95% CI for B β p R2 Adj R2
Independent variables   Lower Upper     
 Relatives’ health–related quality of life (−0.594 = worse than death to 1 = full health) −1.732 −3.272 −.193 −.112 .028*   
 Positive value in caring perceived by relatives (4 = never to 16 = always) −.468 −.646 −.290 −.307 <.001*   
 Quality of support perceived by relatives (4 = never to 16 = always) −.211 −.352 −.070 −.171 .003*   
 Changed behaviour of older person perceived by relatives (1 = never to 5 = very often) 1.002 .660 1.344 .308 <.001**   
 Explained variance       .386 .376
  1. Unstandardized coefficient (B) with 95% confidence interval (CI), standardized coefficient (β) for the independent variables, coefficient of determination (R2) for overall model fit, adjusted coefficient of determination (adj R2) regarding multiple independent variables
  2. *p ≤ 0.05; ** ≤ 0.001