Table 3.

Bivariate Diurnal Coupling of Cortisol and Testosterone

Parameter	Coupled diurnal change		Coupled deviations with change		Coupled diurnal deviations
	Estimate	SE	Estimate	SE	Estimate	SE
Fixed effects
Intercept, γ00	1.57*	.01	1.64*	.01	1.68*	.004
Coupling parameter, γ10	−.01	.009	−.02*	.01	.01	.01
Diurnal Slope, γ20	—	—	−.004*	<.001	−.005*	<.001
Effect of moderators on Cortisol Level
Age, γ01	<.001	.003	<.001	.002	.001	.001
Sex, γ02	.11*	.01	.05*	.01	.003	.002
Severity, γ03	−.001	.004	.001	.002	<.001	.001
Directionality, γ04	−.001	.004	−.004	.002	−.001	.001
Testosterone diurnal slope, γ05	—	—	—	—	.05	.10
Effect of moderators on Coupling
Age, γ11	<.001	.002	−.001	.001	.001	.003
Sex, γ12	.05*	.007	.02*	.005	.03*	.009
Severity, γ13	<.001	.003	.001	.002	−.001	.004
Directionality, γ14	<.001	.002	−.003	.001	−.005	.004
Between-person association of slopes
Testosterone diurnal slope, γ15	—	—	—	—	−.02	.01
Random effects
Cortisol level variance, σ2u0	.0008*	.0003	.0007*	.0002	.0007*	.0001
Coupling variance, σ2u1	.0002†	.0001	.0001	<.0001	.0005	.0004
Diurnal slope variance, σ2u2	—	—	<.0001*	<.0001	<.0001*	<.0001
Residual, σ2e1	.0009*	<.0001	.0007*	.0003	.0007*	<.0001
Fit statistics
−2LL	−4516.2		−4878.2		−5034.7
AIC	−4508.2		−4864.2		−5020.7

Note. Coupling refers the within-person association of cortisol with testosterone. −2LL = log likelihood function. AIC = Akaike information criterion. SE = standard error.

^*= p <.05.