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. 2020 Feb 8;5:50–58. doi: 10.1016/j.cnp.2020.01.003

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© 2020 International Federation of Clinical Neurophysiology. Published by Elsevier B.V.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

PMC Copyright notice

Fig. 3 — 95% confidence intervals of the %decrease in cerebral blood flow of healthy controls and different ME/CFS patient groups at end tilt. The %decrease of all ME/CFS patient groups and subgroups was significantly larger than that of healthy controls. Abbreviations: Atyp: atypical; CBF: cerebral blood flow; CI: confidence interval; Daily life OI: clinician estimate of orthostatic intolerance symptoms; DisDur: disease duration; dOH: delayed orthostatic hypotension; HC: healthy controls; NormHR/BP: patients with a normal heart rate and blood pressure response; Pat: patients; P_etCO₂: end-tidal CO₂ pressure; POTS: postural orthostatic tachycardia syndrome; yrs: years. **: P < .0005; *: P < .01 between groups.