Resource quantities were not reported separately from costs. Cost components were reported separately. The cost calculations consisted of the costs of hospital visits, emergency department visits, physician mistakes, over-the-counter products, other prescriptions, and sumatriptan prescriptions. The perspective adopted in the cost analysis was that of a third party payer. The source of resource utilisation was the patients' self-report based on a 119-question telephone survey and actual pharmacy claims. The source of cost data was the study institution. The price date was 1995. The costs of some types of migraine-related healthcare utilisation (computed tomographic scans, MRI, and other expensive diagnostic tests) were not included. Costs were not discounted.