The HUNT4 study: the validity of questionnaire-based diagnoses.
Knut HagenAnders Nikolai ÅsbergBenjamin L UhligErling TronvikEiliv BrennerTrond SandPublished in: The journal of headache and pain (2019)
The HUNT4 questionnaire is a valid tool for identifying persons with lifetime migraine, self-reported active migraine and active migraine applying liberal modified criteria. The agreement for TTH was fair.
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