Study population
We performed a single-center, retrospective, observational study.
Patients with acute ischemic stroke who were hospitalized in West China
Hospital, Sichuan University from May 1, 2018 to October 1, 2019 were
enrolled. The inclusion criteria were as follows: (1) ageā„18 years, (2)
ischemic stroke confirmed by clinical symptoms and computed tomography
(CT) or magnetic resonance imaging (MRI) on admission, (3)ischemic
stroke onset within 48 hours before admission. The exclusion criteria
were as follows: (1) history of thyroid diseases such as hyperthyroidism
or hypothyroidism, (2) acute hemorrhagic stroke and transient ischemic
stroke. The diagnosis and treatment of all patients with acute ischemic
stroke were based on Chinese guidelines (17).