Table 1.

Summary of hierarchical linear model predicting right amygdala volumes

Fixed effect	Coefficient	Standard error	t-ratio	d.f.	P-value
Intercept, β0
Intercept, γ00	1939.54	207.66	9.34	51	<0.001
PTSD vs control, γ01	−545.55	208.83	−2.61	51	0.012
Sex, γ02	−361.28	242.55	−1.49	51	0.143
For age slope, β1
Intercept, γ10	−20.11	14.02	−1.43	48	0.158
PTSD vs control, γ11	40.88	14.91	2.74	48	0.009
Sex, γ12	29.83	17.03	1.75	48	0.086
For total brain volumes slope, β2
Intercept, γ20	0.00098	0.00035	2.84	48	0.007
PTSD vs control, γ21	−0.00009	0.00040	−0.23	48	0.818
Sex, γ22	0.00067	0.00039	1.70	48	0.096