Table 1 Eligibility criteria for study inclusion
Inclusion criteria | Exclusion criteria |
|---|---|
Study participants with a diagnosis of migraine according to the iteration of ICHD in effect at the time | Conference papers, case series, and case reports |
Language: English, Danish, German | The terms premonitory or prodrome used as a synonym for or referring to reversible neurological symptoms that can reliably be assessed as aura |
Observational studies investigating the overall prevalence or relative frequency of premonitory symptoms in people with migraine (in some cases, also of specific individual symptoms) or observational studies exclusively investigating prevalence or relative frequency of individual premonitory symptoms | Data necessary for the calculation of primary or secondary outcomes cannot be extracted |
Studies reporting results on overlapping cohorts |