Migraine Linked to Cognitive Impairment in Chinese MR
A 2026 study by Bai et al. in Dialogues in Clinical Neuroscience uses Mendelian randomization (MR) — inherited genetic variants as a natural experiment to test causality — and concludes that migraines causally lower cognitive performance in a Han Chinese sample.1 The headline conclusion is plausible; the effect-size numbers in the popular MR shorthand (odds …