Pre-stroke sleep quality predicts 1-year mortality and functional outcomes in ischemic stroke and TIA patients

This cohort study of 2,266 stroke/TIA patients found that poor pre-stroke subjective sleep quality (highest PSQI quartile) significantly increased 1-year mortality risk (3.73-fold) and poor functional outcome risk (2.15-fold) compared to good sleep quality. The association remained independent after adjusting for confounders, suggesting sleep quality as a prognostic marker in acute ischemic stroke.