Parkinsonian Symptomatology May Correlate with CT Findings before and after Shunting in Idiopathic Normal Pressure Hydrocephalus
Table 4
Canonical correlations between the grades of the Parkinsonian features responding to the ventriculoperitoneal shunt operation and computed tomography findings.
First canonical variate
Correlation
Coefficient
CT finding set
Third ventricle width at superior colliculus
0.23
0.908
Third ventricle width at foramen of Monro
0.612
1.011
Anteroposterior diameter of midbrain
0.094
0.529
Left-to-right diameter of midbrain
0.162
0.504
Evans index
0.814
0.564
Percent of variance
0.225
Redundancy index
0.223
Parkinsonism set (assessed by UPDRS)
Total score of motor examination
0.59
1.151
Subitem score of postural stability
0.592
0.624
arising from chair
0.499
0.605
body bradykinesia and hypokinesia
0.356
1.09
Percent of variance
0.27
Redundancy index
0.266
Canonical Correlation
0.996
CT: computed tomography; : number of subjects; UPDRS: unified Parkinson’s disease rating scale; Percent of variance average squared loading (); Redundancy index average canonical . The total number of patients was 11.
