Cephalalgia : an international journal of headache
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Randomized Controlled Trial Multicenter Study
Minimal clinically important change on the Headache Impact Test-6 questionnaire in patients with chronic tension-type headache.
To determine the minimal clinically important change (MCIC) in Headache Impact Test-6 (HIT-6) score in patients with chronic tension-type headache (CTTH). ⋯ A clinically relevant improvement in patients with CTTH is reflected by a decrease of at least 8 points on the HIT-6.