Development of a claims-based algorithm to identify potentially undiagnosed chronic migraine patients. Cephalalgia : an international journal of headache Pavlovic, J. M., Yu, J. S., Silberstein, S. D., Reed, M. L., Kawahara, S. H., Cowan, R. P., Dabbous, F., Campbell, K. L., Shewale, A. R., Pulicharam, R., Kowalski, J. W., Viswanathan, H. N., Lipton, R. B. 2019: 333102418825373


OBJECTIVE: To develop a claims-based algorithm to identify undiagnosed chronic migraine among patients enrolled in a healthcare system.METHODS: An observational study using claims and patient survey data was conducted in a large medical group. Eligible patients had an International Classification of Diseases, Ninth/Tenth Revision (ICD-9/10) migraine diagnosis, without a chronic migraine diagnosis, in the 12 months before screening and did not have a migraine-related onabotulinumtoxinA claim in the 12 months before enrollment. Trained clinicians administered a semi-structured diagnostic interview, which served as the gold standard to diagnose chronic migraine, to enrolled patients. Potential claims-based predictors of chronic migraine that differentiated semi-structured diagnostic interview-positive (chronic migraine) and semi-structured diagnostic interview-negative (non-chronic migraine) patients were identified in bivariate analyses for inclusion in a logistic regression model.RESULTS: The final sample included 108 patients (chronic migraine=64; non-chronic migraine=44). Four significant predictors for chronic migraine were identified using claims in the 12 months before enrollment: =15 versus <15 claims for acute treatment of migraine, including opioids (odds ratio=5.87 [95% confidence interval: 1.34-25.63]); =24 versus <24 healthcare visits (odds ratio=2.80 [confidence interval: 1.08-7.25]); female versus male sex (odds ratio=9.17 [confidence interval: 1.26-66.50); claims for =2 versus 0 unique migraine preventive classes (odds ratio=4.39 [confidence interval: 1.19-16.22]). Model sensitivity was 78.1%; specificity was 72.7%.CONCLUSIONS: The claims-based algorithm identified undiagnosed chronic migraine with sufficient sensitivity and specificity to have potential utility as a chronic migraine case-finding tool using health claims data. Research to further validate the algorithm is recommended.

View details for DOI 10.1177/0333102418825373

View details for PubMedID 30854881