Increased risk of urinary calculi in patients with migraine: A nationwide cohort study

Objective: Whether migraine is associated with urinary calculi is an unresolved issue, although topiramate, a migrainepreventive agent, is known to contribute to this complication. This study investigates the association between migraine and the risk of urinary calculi. Methods: We identified a total of 147,399 patients aged ≥18 years with migraine diagnoses recorded in the Taiwan National Health Insurance Research Database between 2005 and 2009. Each patient was randomly matched with one individual without headache using propensity scores. All participants were followed from the date of enrollment until urinary calculi development, death, or the end of 2010. Results: The risk of urinary calculi was greater in the migraine than the control cohort (adjusted hazard ratio (aHR), 1.58; 95% confidence interval (CI), 1.52-1.63; p