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Research Article: Admission hyperglycemia, estimated glomerular filtration rate and outcome of acute ischemic stroke after mechanical thrombectomy: a mediation analysis

Date Published: 2026-06-17

Abstract:
Multiple factors influence the efficacy of mechanical thrombectomy (MT) in patients with acute ischemic stroke. This study aimed to clarify the association between admission hyperglycemia (AH) and long-term functional outcome and to determine whether this association is mediated by postoperative renal function. A total of 397 patients with acute ischemic stroke who underwent MT between February 2018 and June 2024 and had available 6-month follow-up were included in this study. Functional outcome was assessed using the modified Rankin Scale (mRS), with scores of 0–2 indicating a good outcome. Multivariable regression models were constructed, adjusting for relevant covariates, including diabetes and the diabetes × AH interaction term. Mediation analysis was performed to explore the mediating effect of postoperative renal function. Among the 397 patients, the median postoperative estimated glomerular filtration rate (post-eGFR) was 92.4?mL/min/1.73?m 2 (IQR: 76.2–106.3), 198 (49.9%) patients had AH, and a good outcome at 6?months was achieved in 151 (38.0%) patients. After adjustment for confounding factors, multivariable regression analysis demonstrated that AH [OR (95% CI): 3.148 (1.672–5.925), p <?0.001] and lower post-eGFR [OR (95% CI): 0.978 (0.963–0.993), p =?0.004] were significantly associated with a lower likelihood of a good outcome at 6?months. Mediation analysis showed that post-eGFR mediated the association between AH and good prognosis, accounting for 25.57% of the total effect. Our study suggests that admission hyperglycemia is independently associated with long-term functional outcome after MT in patients with acute ischemic stroke, with or without diabetes. This association may be partly mediated by postoperative renal function.

Introduction:
Multiple factors influence the efficacy of mechanical thrombectomy (MT) in patients with acute ischemic stroke. This study aimed to clarify the association between admission hyperglycemia (AH) and long-term functional outcome and to determine whether this association is mediated by postoperative renal function.

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