Per cent proportion of non-invasive estimator of CPP fitting 5, 10, and 15 mm Hg error ranges compared with direct (invasive) CPP (n=12725 1 minute averages)

ErrorAll 1 minute averagesDay averages
nCPPLeft nCPPRight nCPPnCPPLeft nCPPRight nCPP
<5 mm Hg493841583944
<10 mm Hg817172897678
<15 mm Hg949187949290
  • nCPP=Global non-invasive CPP; left nCPP= left hemisphere nCPP; right nCPP= right hemisphere nCPP