Measuring Success in Headache Surgery: A Comparison of Different Outcomes Measures.

BACKGROUND: Studies of migraine surgery have relied on quantitative, patient-reported measures like the Migraine Headache Index (MHI) and validated surveys to study the outcomes and impact of headache surgery. It is unclear whether a single metric or a combination of outcomes assessments is best suited to do so. METHODS: All patients who underwent headache surgery had an MHI calculated and completed the Headache Impact Test, the Migraine Disability Assessment Test, the Migraine-Specific Quality-of-Life Questionnaire, and an institutional ad hoc survey preoperatively and postoperatively. RESULTS: Twenty-seven patients (79%) experienced greater than or equal to 50% MHI reduction. MHI decreased significantly from a median of 210 preoperatively to 12.5 postoperatively (85%; P < 0.0001). Headache Impact Test scores improved from 67 to 61 (14%; P < 0.0001). Migraine Disability Assessment Test scores improved from 57 to 20 (67%; P = 0.0022). The Migraine-Specific Quality-of-Life Questionnaire demonstrated improvement in quality-of-life scores within all three of its domains ( P < 0.0001). The authors' ad hoc survey demonstrated that participants "strongly agreed" that (1) surgery helped their symptoms, (2) they would choose surgery again, and (3) they would recommend headache surgery to others. CONCLUSIONS: Regardless of how one measures it, headache surgery is effective. The authors demonstrate that surgery significantly improves patients' quality of life and decreases the effect of headaches on patients' functioning, but headaches can still be present to a substantial degree. The extent of improvement in migraine burden and quality of life in these patients may exceed the amount of improvement demonstrated by current measures.

"Like a Normal Person Again": A Qualitative Analysis of the Impact of Headache Surgery.

BACKGROUND: Outcomes after migraine surgery have been previously assessed using quantitative measurements, including the migraine headache index. Qualitative methodologies offer the ability to analyze patients' perceptions and pain experience, and may point to changes in domains not captured by quantitative instruments. The purpose of this study was to characterize individual patients' experiences with migraines and to analyze how patients' experience of headaches changes in relation to surgery. METHODS: Patients who previously underwent migraine surgery performed by a single surgeon participated in semistructured interviews at least 1 year after surgery. Purposive sampling was used to recruit patients [n = 15 (73 percent female)]. Interviews were transcribed verbatim. A multidisciplinary team with backgrounds in surgery, pain management, medicine, and health services research coded and analyzed transcripts. RESULTS: Participants reported improvements in one or more domains of pain following surgery, and changes in medication use and effectiveness. Even in individuals with persistent pain postoperatively, surgery appeared to facilitate an improvement in headache self-efficacy, including an ability to participate in daily activities. Migraineurs frequently described a new degree of control over at least one aspect of their pain. CONCLUSIONS: Migraine surgery appears to positively impact patients' lives in ways that support and expand on previously published outcomes. Patients report benefiting from surgery in ways that are not currently captured in commonly used metrics. This study's findings support the need for more specific patient-reported outcome measures to help clinicians and patients understand the impact of surgery and which outcomes matter most to patients.