Table 4.

Summary of simple mediation models assessing the indirect effect of healthy eating, physical activity or medication adherence on the relationship between delay discounting and HbA1c.

					Bca 95% CI^c
Mediator	Effect of DD on HbA1c	Effect of DD on mediator	Effect of Mediator on HbA1c	DD on HbA1c through mediator	Lower	Upper	Effect Ratio^d
	(Direct effect C’)^a	(Path A)^a	(Path B)^a	(Indirect effect)^b
Healthy Eating Index	0.017*(0.01)	−1.54 (0.06)	0.00 (0.79)	−0.0007	−0.007	+0.005	−0.0438
Physical Activity	0.015 (0.08)	−0.311* (0.04)	−0.002 (0.72)	0.0007	−0.002	+0.007	−0.0462
Medication Adherence	0.022* (0.02)	−2.32* (0.01)	0.0012 (0.26)	−0.0028	−0.001	+0.002	−0.1468

Standardized regression coefficients, p values in ().

The magnitude of the indirect effect is estimated by the product of the regression coefficients of the predictive variables from Path A (DD to mediator) and Path B (mediator to HbA1c).

BCa = bias-corrected and accelerated 95% confidence intervals obtained from 10,000 bootstrap resamples. Confidence intervals not containing zero suggest that the indirect effect is significant at the 0.95 level.

Effect ratio = indirect effect/total effect. The effect ratio quantifies the proportion of the total effect explained by the indirect effect.