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Table 2 Post hoc comparisons of vascular and CSF flow results in the four groups.

From: Cerebrospinal fluid and blood flow in mild cognitive impairment and Alzheimer's disease: a differential diagnosis from idiopathic normal pressure hydrocephalus

  HEVs vs. aMCI HEVs vs. AD HEVs vs. NPH aMCI vs. AD aMCI vs. NPH AD vs. NPH
tCBF 0.01 NS NS NS <0.01 0.06
API <0.05 NS NS NS NS NS
Arterial pulse volume <0.01 NS NS 0.06 <0.01 NS
VBF <0.01 NS NS NS <0.01 NS
AV stroke volume <0.01 NS NS NS 0.05 NS
AV delay <0.01 <0.01 <0.01 NS NS NS
Aqueductal stroke volume NS NS <0.05 NS NS <0.05
  1. HEVs: Healthy elderly volunteers; aMCI: patients with amnesic mild cognitive impairment; AD: patients with Alzheimer's disease; NPH: patients with normal pressure hydrocephalus; tCBF: total cerebral arterial blood flow; API: arterial pulsatility index; VBF: venous blood flow; AV: arteriovenous. P values in bold are statistically significant. P values on a grey background are close to statistical significance. NS: not significant.