Table 2.

Results of the Moderated Mediation (1-1-1) Model Examining the Associations Among Alcohol Use, Sleep Duration, and Next-Day Tiredness in Older and Younger Adults

Fixed Effects	Estimate	SE	p-value
AlcoholUse → SleepDuration (γ10 )	−0.12*	0.02	<.0001
SleepDuration → NextDayTiredness (γ20 )	−0.31*	0.02	<.0001
AlcoholUse → NextDayTiredness (γ30 )	0.03*	0.01	0.004
AgeGroup x AlcoholUse → SleepDuration (γ11 )	0.08*	0.03	0.002
AgeGroup x SleepDuration → NextDayTiredness (γ21 )	0.001	0.03	0.96
AgeGroup x AlcoholUse → NextDayTiredness (γ31 )	−0.04*	0.02	0.04
Random Effects	Estimate	SE	p-value
Random Slope Variance
$\text{AlcoholUse}\to \text{SleepDuration}({\sigma }_{u_{ai}}^2)$	0.01*	0.003	<.0001
$\text{SleepDuration}\to \text{NextDayTiredness}({\sigma }_{u_{bi}}^2)$	0.03*	0.003	<.0001
$\text{AlcoholUse}\to \text{NextDayTiredness}({\sigma }_{u_{c^{\prime }i}}^2)$	0.004*	0.001	0.004
$\text{Covariance}(r_{{\sigma }_{u_{ai}}^2{\sigma }_{u_{bi}}^2})$	−0.003	0.003	0.32
$\text{Covariance}(r_{{\sigma }_{u_{ai}}^2{\sigma }_{u_{c^{\prime }i}}^2})$	0.001	0.002	0.57
$\text{Covariance}(r_{{\sigma }_{u_{bi}}^2{\sigma }_{u_{c^{\prime }i}}^2})$	−0.004*	0.002	0.03
Residual Variance
NextDayTiredness (α0Y )	1.08*	0.02	<.0001
AgeGroup x NextDayTiredness(α1Y )	−0.87*	0.02	<.0001
SleepDuration (α0M )	0.44*	0.02	<.0001
AgeGroup x SleepDuration (α1M )	−0.30*	0.03	<.0001
Fit Indices
AIC	89446.60
BIC	89477.70

Note: N_observations = 16598 days nested within 166 persons; AIC = Akaike information criteria; BIC = Bayesian information criteria; SE = standard error.

^*p < .05.