Dowson, A.

headache patient migraine study questionnaire score disability treatment impact sumatriptan triptan assessment medication migraine-act measure diagnosis question severity attack result practice period physician sufferer 2 hours management preference migraine disability assessment lipton rb efficacy prevalence change reliability symptom lipton headache impact test therapy table grade group response validity population month outcome clinic level migraine patients relief cephalalgia patient preference headache-related disability migraine sufferers dowson comparison rizatriptan activity number analyses neurology trial depression utility disturbance research headache severity figure factor pharmacist criteria -36 tension-type headache stewart migraine-act questionnaire specialist analysis screening endpoints pain inventory quality