Table 3:

Tests of fixed effects in LMM 3.1

GroupaAgeaInteraction
ROIaFPFpFp
WM4.4<0.05405.2<0.000019.6<0.00001
Thalamus3.7<0.05108.8<0.000018.2<0.00001
Globus pallidus1.60.2148.4<0.000013.7<0.05
Brainstem1.10.3700.7<0.000013.9<0.05
Cerebellum1.60.2120.5<0.0000110.4
Amygdala1.60.212.7<0.013.2<0.05
Cortex1.90.211.4<0.012.20.1
Putamen0.80.410.8<0.011.90.2
Caudate2.30.10.70.40.70.5
Hippocampus1.80.20.20.62.30.1
• The table includes the results of the test for fixed effects used in the LMM3.1: age, group, and age × group interaction. Note that the volume of a single ROI was used as a dependent variable in LMM3.1.

• aThe degrees of freedom for the numerator and denominator are 1 and 123 (age), 2 and 96 (group), and 2 and 123 (interaction), respectively. Note that only p values <0.005 were considered significant (adjustment for 10 ROIs included in the analysis).