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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Neurosurg Clin N Am. 2019 Apr;30(2):219–230. doi: 10.1016/j.nec.2018.12.005

Figure 2. VNS Seizure freedom rate and responder rate from systematic literature review.

Figure 2

This data, from 2869 patients across 78 studies, shows increases in both responder rate and seizure freedom rate over time. At last follow-up 60% of patients achieved responder status to VNS and 8% of patients were seizure free. N = 650, 405, 1503, 876, and 326 patients at each follow-up period, respectively. VNS, vagus nerve stimulation. (From Englot DJ, Rolston JD, Wright CW, et al. Rates and predictors of seizure freedom with vagus nerve stimulation for intractable epilepsy. Neurosurgery. 2015;79(3):345–353; with permission.)