Table 3.

Analysis of difference in the brainstem variables among various age groups.

ANOVA
		Sum of Squares	df	Mean square	F	p value.
Cerebral peduncle (CP) (Right)∗	Between groups	643.223	9	71.469	43.723	.001
	Within groups	1642.761	1006	1.635
	Total	2285.984	1015
Cerebral peduncle (CP) (Left)∗	Between groups	667.444	9	74.160	41.450	.001
	Within groups	1798.079	1006	1.789
	Total	2465.523	1015
Interpeduncular angle (IPA)∗	Between groups	7433.313	9	825.924	10.077	.001
	Within groups	79,505.678	971	81.965
	Total	86,938.991	980
Middle cerebellar peduncle (MCP) (Right)∗	Between groups	733.013	9	81.446	41.242	.001
	Within groups	1984.707	1006	1.975
	Total	2717.720	1015
Middle cerebellar peduncle (MCP) (Left)∗	Between groups	749.598	9	83.289	42.125	.001
	Within groups	1985.070	1005	1.977
	Total	2734.668	1014
Ventral midbrain anteroposterior (VMAP) thickness∗	Between groups	334.193	9	37.133	37.683	.001
	Within groups	990.315	1006	.985
	Total	1324.508	1015
Midbrain height (MH)	Between groups	461.342	9	51.260	26.929	.001
	Within groups	1341.981	706	1.904
	Total	1803.323	715
Mamillopontine distance (MPD)∗	Between groups	51.956	9	5.773	2.374	.012
	Within groups	1198.760	494	2.432
	Total	1250.716	503
Pontomesencephalic angle (PMA)∗	Between groups	2710.333	9	301.148	3.301	.001
	Within groups	45,978.671	505	91.228
	Total	48,689.004	514
Pons anteroposterior (PAP) thickness∗	Between groups	1496.296	9	166.255	79.951	.001
	Within groups	2085.698	1004	2.079
	Total	3581.994	1013
Medulla anteroposterior (MedAP) thickness∗	Between groups	475.555	9	52.839	4.194	.001
	Within groups	12,649.243	1005	12.599
	Total	13,124.798	1014
Spinal cord anteroposterior (SCAP) diameter∗	Between groups	70.879	9	7.875	14.474	.001
	Within groups	273.682	504	.544
	Total	344.561	513

∗ significant at .05 level of significance.