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The diagnosis of headache subtypes in 453 patients was made by headache experts according to the ICHD-II and the likelihood ratios (LR) of clinical characteristics of migraine were calculated in Part I of the study.
We compared this questionnaire to the gold standard: the diagnosis made by headache specialists, based on the the ICHD-II criteria.
Diagnoses were made by headache experts using a combination of questionnaires and direct interviews based on the 2004 IHS diagnostic criteria [3].
Migraine patients that improved at follow-up showed also a higher number of first diagnoses made by headache specialists at baseline (74.8 vs. 69.1% of cases).
In each of these, questionnaire-derived diagnoses were compared with "gold-standard" diagnoses made by headache experts, in most cases in a subset of participants in a nationwide study.
The gold standard used to test the validity of the questionnaire was the face to face diagnosis of probable MOH made by headache specialists, based on the second edition of the ICHD-II.
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Previously, we have done two face-to-face headache interviews in the general population to validate questionnaire-based diagnosis with diagnosis made by a headache specialist [6, 12].
ARTe Cluster Project includes now 210 paintings (95 made by Cluster Headache sufferers; http://alcecluster.cefalea.it/).
The gold standard was the clinical diagnosis made by a headache specialist according to the ICHD criteria.
Prior to admission, a diagnosis of chronic migraine without aura based on ICHD-2 criteria was made by a headache specialist (Sait Ashina).
The diagnosis of CM will be made by a headache specialist based on the diagnostic criteria of the ICHD-III beta (2013) and on the CM classification proposed by Manzoni et al[1].
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