Validation of the Headache Impact Test (HIT-6™) across episodic and chronic migraine

Also consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1. Preface to the Second Edition· 2004 · 2,053 citations
2. Response to Hays et al and McHorney and Cohen: Practical Implications of Item Response Theory and Computerized Adaptive Testing· 2000 · 245 citations
3. How to score and interpret single-item health status measures: a manual for users of the SF-8™ Health Survey.· 2001 · 831 citations
4. Headache Impact Test-6 (HIT-6) Scores for Migraine Patients: Their Relation to Disability as Measured from a Headache Diary· 2008 · 156 citations
5. Chronic migraine in the population· 2008 · 495 citations