Figure 5.

Timing of premonitory symptoms. (A) Premonitory symptoms reported first. Depicted is the number of GTN responders who reported a particular specific premonitory symptom first. In case 2 symptoms were reported simultaneously (P23 and P37, see e-figure 2, http://links.lww.com/PAIN/B2), both symptoms were plotted. Two GTN responders (P19 and P24) not reporting premonitory symptoms, and P3 that reported none of the identified specific premonitory symptoms, were not included (see e-figure 2, http://links.lww.com/PAIN/B2). (B) Timing of premonitory symptoms relative to onset of migraine-like headache. Depicted are the interquartile ranges plotted for yawning, nausea, photophobia, and concentration difficulties composed of all responders that reported these symptoms relative to the onset of the migraine-like headache attacks. GTN, glyceryl trinitrate.