Research Article

Parkinsonian Symptomatology May Correlate with CT Findings before and after Shunting in Idiopathic Normal Pressure Hydrocephalus

Table 3

Effect of ventriculoperitoneal shunt operation on the computed tomography findings.

 Pre VP shuntPost VP shuntP value
 (Mean SD)(Mean SD) 

Evans index0.38 0.0470.33 0.43.001
Third ventricle width at superior colliculus10.55 1.808.14 2.03.037
Third ventricle width at foramen of Monro12.87 2.0011.24 2.43.155
Anteroposterior diameter of midbrain20.86 2.0322.47 1.77.159
Left-to-right diameter of midbrain29.64 2.8229.59 2.14.967

P value by 2-way analysis of variance with repeated measure. The total number of patients was 12.