Table 3.

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

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%

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

Note: The proportion explained in the total effect by the indirect effect = indirect effect/total effect

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