Figure 4.

Abortive medication use (mITT population).

(a) Use of sumatriptan and oxygen: baseline vs the last two weeks of the randomised phase.

(b) Use of sumatriptan and oxygen: last two weeks of the randomised phase vs the last two weeks of the extension phase.

mITT: modified intent-to-treat; nVNS: non-invasive vagus nerve stimulation; SoC: standard of care.

Values are presented as means and were calculated from all participants with evaluable data.

Error bars denote standard error of the mean.