Fig. 5

Cumulative correlation analysis between pre-/postnVNS OXY levels and nVNS outcome in headache frequency (attacks/month). Assessment of cumulative pre- and post-nVNS OXY levels showed no association with number of attacks per month (r = 0.343, p = 0.12). OXY Oxytocin, IL-1ß Interleukin-1ß, HC healthy controls, ns not significant