Phenotypic characterization of acute headache attributed to SARS-CoV-2: An ICHD-3 validation study on 106 hospitalized patients.

Of the patients who had prior history of migraine or TTH, we did not observe differences in the frequencies of persistent or non-persistent headache, but patients with pre-existing headache showed a trend to fulfil more ICHD-3 criteria for migraine (p = 0.033; the statistical significance threshold was 0.006 after adjusting for multiple comparisons).

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