Healthcare utilization and costs among patients with chronic migraine, episodic migraine, and tension-type headache enrolled in commercial insurance plans

Objective To quantify and compare healthcare utilization and costs for patients with chronic migraine (CM), episodic migraine (EM), and tension-type headache (TTH) enrolled in US commercial health plans. Methods This retrospective cohort study used the Optum Clinformatics (R) Data Mart database from January 2015 to December 2018. Adult patients with a diagnosis of EM, CM or TTH and at least 12 months of continuous enrollment before and after diagnosis were included. Inverse probability of treatment weighting was used to adjust for baseline differences among the three groups. Patient demographic and clinical characteristics at baseline, and healthcare utilization and costs during follow-up, were described and compared between the three groups. Results A total of 45,849 patients were included: 8955 with CM, 31,961 with EM, and 4933 with TTH. The total all-cause annual direct medical costs of patients with CM ($17,878) were 1.38 times higher (95% CI: 1.31-1.44) than those with EM ($12,986), and 2.26 times higher (95% CI: 2.08-2.47) than those with TTH ($7902). The annual migraine/TTH-related costs of patients with CM ($1869) were 4.19 times higher (95% CI: 3.92-4.48) than those with EM ($446), and 11.90 times (95% CI: 10.59-13.52) higher than those with TTH ($157). In the adjusted analyses, for all service categories (emergency department, inpatient, outpatient, and prescriptions), the expected costs in the migraine groups were higher than in the TTH group (all p < 0.001), while controlling for covariates. Main findings were consistent in both weighted and unweighted samples, and with both unadjusted and adjusted analyses. Conclusion This study provides an updated assessment of healthcare utilization and expenditures for adult patients with primary headache disorders. Compared to TTH, migraine is associated with higher resource use and direct medical costs, especially for those with a chronic condition. Future studies are needed to understand the indirect medical costs (productivity loss) and humanistic burden (quality of life) between migraine and TTH.