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. Author manuscript; available in PMC: 2019 Jun 19.
Published in final edited form as: Alcohol Clin Exp Res. 2018 Aug 28;42(10):2033–2046. doi: 10.1111/acer.13858

Table 3.

Moderated Mediation Model of the Associations between Child Maltreatment, Delayed Reward Discounting, Substance Use, and HRV Reactivity (N = 225)

Paths B (SE) β 95%CI of B
Direct effects
 CM (T1) → DRD (T1) .580 (.230) .177 [.129, 1.030]*
 DRD (T1) → Alcohol (T2) .011 (.117) .009 [−.219, .241]
 ΔHRV (T1) → Alcohol (T2) −.049 (.107) −.042 [−.259, .160]
 CM (T1) → Alcohol (T2) −.693 (.413) −.178 [−1.503, .117]
 DRD (T1) → Drug (T2) .158 (.111) .124 [−.059, .375]
 ΔHRV (T2) → Drug (T2) .005 (.116) .004 [−.223, .233]
 CM (T1) → Drug (T2) −.206 (.364) −.050 [−.920, .507]
Interaction Effects (small, medium, large magnitudes)
Small DRD
 ΔHRV × DRD → Alcohol (T2) .209 (.099) .168 [.014, .404]*
 ΔHRV × DRD → Drug (T2) −.082 (.101) −.062 [−.280, .115]
Medium DRD
 ΔHRV × DRD → Alcohol (T2) .07 (.11) .05 [−.14, .27]
 ΔHRV × DRD → Drug (T2) −.23 (.12) −.15 [−.47, .01]
Large DRD
 ΔHRV × DRD → Alcohol (T2) .06 (.11) .04 [−.16, .28]
 ΔHRV × DRD → Drug (T2) −.20 (.13) −.14 [−.46, .06]
Conditional Indirect Effect (small DRD)
 CM → ΔHRV × DRD → Alcohol (T2) .121 (.078) .030 [.001, .302]*
 CM → ΔHRV × DRD → Drug (T2) −.048 (.066) −.011 [−.196, .070
Covariates
 Alcohol (T1)→ Alcohol (T2) 1.093 (.243) .457 [.616, 1.570]***
 Drug (T1) → Drug (T2) 1.494 (.258) .590 [.987, 2.000]***
 Gender → DRD (T1) −.150 (.144) −.077 [−.432, .132]
 Gender → Alcohol (T2) −.210 (.244) −.090 [−.687, .267]
 Gender → Drug (T2) −.166 (.252) −.067 [−.660, .327]
 Age → DRD (T1) .022 (.031) .048 [−.039, .082]
 Age → Alcohol (T2) −.094 (.056) −.177 [−.204, .017]
 Age → Drug (T2) −.013 (.057) −.023 [−.126, .099]
 FIncome → DRD (T1) .003 (.006) .043 [−.010, .016]
 FIncome → Alcohol (T2) −.008 (.011) −.097 [−.030, .014]
 FIncome → Drug (T2) .012 (.009) .133 [−.006, .029]

Note. N = 225; DRD = Delayed reward discounting small logK value; T1 = Time 1; T2 = Time 2; SE = Standard error. CI = Confidence interval; CM = Childhood maltreatment experiences; ΔHRV = HRV Residualized Change Score; Alcohol = Alcohol use problems; Drug = Drug use problems; FIncome = Family annual income. Gender was coded as 1 for male and 2 for female. Model fit is acceptable: χ2 (63) = 85.94 (p < .05). CFI = .93, WRMR = .82, RMSEA = .04.

*

p < .05;

**

p < .01;

***

p < .001;

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