Table 4.

Regression Models Testing Direct and Indirect Effects of Caregiver Group and Positive Mood on MHI

	Morning Positive Mood (n = 81)	Nightly Positive Mood (n = 85)
Total Effect
Caregiver group	−17.62^a,^b ± 6.02	−16.51^a,^b ± 5.82
Full Effects
Intercept	52.37 ± 27.10	31.56 ± 26.4
Caregiver group	−13.62^a,^b ± 6.53	−11.39 ± 6.03
Mood	8.16 ± 5.39	10.67^a,^b ± 4.38
Model R²	0.13	0.16
Indirect Effect (Bootstrapped, 95% CI)
Mood	−3.99 (−11.27, 0.82)	−5.12^a,^b (−11.61, −0.94)

Values are mean ± SEM unstandardized B effects, representing units of mitochondrial health index (MHI), unless otherwise indicated. Daily mood measures were assessed before blood draw. Significance assessed using bias-corrected bootstrap confidence interval (CI). Age is a covariate in each model, not shown here.

Statistically significant value.

p < .05.