Headache The Journal of Head and Face Pain · 2007 · 117 citations · 33 references
Prevalence of EM is higher in women with migraine than in nonheadache controls. Migraineurs with EM have more frequent and disabling headaches, and are more likely to have other comorbid conditions affecting mood and pain, compared to migraineurs without EM.
33
Choice Reviews Online · 1990 · 35.6K citations
A six-item short-form survey for measuring headache impact: The HIT-6™
Mark Kosinski, Martha Bayliss, John E. Ware et al. · Quality of Life Research · 2003 · 1.3K citations
Comorbidity of migraine and depression
Naomi Breslau, Richard B. Lipton, Walter F. Stewart et al. · Neurology · 2003 · 625 citations