Table 2 Analysis of difference between normal pressure hydrocephalus (NPH) versus control group (t test)

PDV (cm/s)

4.20 ± 1.16

2.11 ± 0.37

0.0004*

PSV (cm/s)

4.96 ± 1.55

2.73 ± 0.50

0.0008*

Vmax (cm/s)

4.58 ± 1.28

2.42 ± 0.26

0.0005*

SV (ML)

83.23 ± 27.45

25.33 ± 5.30

0.009*

Aqueduct area (cm²)

0.08 ± 0.02

0.04 ± 0.01

0.008*

Maximum flow (cm³/s)

0.35 ± 0.13

0.12 ± 0.04

0.004*