Fig. 1
Patient disposition. Notes: 1 Each group except the group of other headache types included individuals classified as probable migraine, probable tension-type headache, or probable cluster headache, respectively. 2 There were 42 individuals who were classified into both migraine and tension-type headache. 3 There were 8 individuals who were classified into both migraine and cluster headache. 4 Post-hoc analysis of the “other headache types” by Sakai et al. [13] showed 261 people who had two or more matches with ID Migraine [18] and 286 people who had two or more matches with the 4-item simple migraine screener [19], both of which were modified versions for Japanese