ANCOVA and eta statistics

ANCOVA/Factor	Sum Squared	df	Mean Squared	F	P Value	η²	Partial η²
Axial diffusivity
Main effects
Age	3.045	1	3.045	44.26	<.001	0.1169	0.1271
Region	1.801	3	0.600	8.72	<.001	0.0692	0.0793
Interaction
Age × region	0.280	3	0.093	1.36	.26	0.0108	0.0132
Model error	20.917	304	0.069			0.8032
Model totals	26.044
Radial diffusivity
Main effects
Age	0.014	1	0.014	2.24	.14	0.0069	0.0073
Region	0.101	3	0.034	5.43	.001	0.0501	0.0508
Interaction
Age × region	0.018	3	0.006	0.94	.42	0.0087	0.0092
Model error	1.890	304	0.006			0.9344
Model totals	2.023
Mean diffusivity
Main effects
Age	0.270	1	0.270	16.20	<.001	0.0469	0.0506
Region	0.346	3	0.115	6.93	<.001	0.0602	0.0640
Interaction
Age × region	0.072	3	0.024	1.44	.23	0.0125	0.0140
Model error	5.061	304	0.017			0.8804
Model totals	5.749
Fractional anisotropy
Main effects
Age	0.563	1	0.563	96.11	<.001	0.2258	0.2402
Region	0.115	3	0.038	6.55	<.001	0.0462	0.0607
Interaction
Age × region	0.034	3	0.011	1.94	.12	0.0136	0.0187
Model error	1.781	304	0.006			0.7143
Model totals	2.493