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 shunt	Post VP shunt	P value
	(Mean ± SD)	(Mean ± SD)
Evans index	0.38 ± 0.047	0.33 ± 0.43	.001
Third ventricle width at superior colliculus	10.55 ± 1.80	8.14 ± 2.03	.037
Third ventricle width at foramen of Monro	12.87 ± 2.00	11.24 ± 2.43	.155
Anteroposterior diameter of midbrain	20.86 ± 2.03	22.47 ± 1.77	.159
Left-to-right diameter of midbrain	29.64 ± 2.82	29.59 ± 2.14	.967

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