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Table 3 Single mediator models predicting FQoL from caregiver responses to the MD STARnet Caregiver Questionnaire (n = 191)1

From: Perceived quality of life among caregivers of children with a childhood-onset dystrophinopathy: a double ABCX model of caregiver stressors and perceived resources

Mediation Models

Total Effect

Direct Effect (Path c’)

Mediator to DV (Path b)

Indirect Effect

Proportion

(Path c)

b

SE

95% CI

b

SE

95% CI

b

SE

95% CI

Total Effect

 Total effect Stressor pile-up on FQoL

−2.75

             

 Model 1: MSPSS2

  Stressor-pileup

 

−1.28

0.57

−2.40

−0.15

         

  MSPSS

     

0.52

0.06

0.41

0.64

−1.47

0.46

−2.54

−0.67

53%

 Model 2: PSS3

  Stressor-pileup

 

−1.38

0.62

−2.61

−0.15

         

  PSS

     

−0.92

0.14

−1.20

−0.65

−1.37

0.38

−2.19

−0.77

50%

 Model 3: DUSOCS-F4

  Stressor-pileup

 

−1.42

0.60

−2.61

−0.23

         

  DUSOCS-F

     

0.27

0.04

0.20

0.34

−1.33

0.32

−1.98

−0.74

48%

 Model 4: DUSOCS-NF5

  Stressor-pileup

 

−2.40

0.65

−3.68

−1.12

         

  DUSOCS-NF

     

0.11

0.04

0.03

0.19

−0.35

0.21

−0.98

−0.07

13%

  1. DV dependent variable, b unstandardized regression coefficient, SE standard error, CI confidence interval, FQoL Family Quality of Life, MD STARnet Muscular Dystrophy Surveillance, Tracking and Research Network, MSPSS Multidimensional Scale of Perceived Social Support, DUSOCS-F Duke Social Stress and Support Scale – Family, DUSOCS-NF Duke Social Stress and Support Scale – non-Family, PSS Perceived Stress Support, FACIT-SP Functional Assessment of Chronic Illness Therapy 12-item Spiritual Well-Being Scale (modified), FQoL Beach Center Family Quality of Life Scale
  2. Note: The proportion explained in the total effect by the indirect effect = indirect effect/total effect
  3. 1Questionnaires completed August 2011 through February 2012. 2 R2 = 0.36, F(2188) = 52.10, p < .001. 3 R2 = 0.26, F(2188) = 32.62, p < .001. 4 R2 = 0.29, F(2188) = 38.71, p < .001. 5 R2 = 0.12, F(2188) = 13.30, p < .001