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Elevated Lipoprotein (a) and Risk of Poor Functional Outcome in Chinese Patients with Ischemic Stroke and Type 2 Diabetes

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Abstract

The aim of this study was to evaluate the short-term prognostic value of early measurement of serum lipoprotein (a) [Lp(a)] levels in Chinese patients with type 2 diabetes (T2D) and acute ischemic stroke (AIS). The study population comprised 232 consecutive patients with an AIS diagnosis complicated with T2D. Functional outcome was obtained on month 3 according to the modified Rankin Scale (mRS). Unfavorable functional outcome was defined as a mRS score of 3 to 6 points. The prognostic value of Lp(a) at admission to predict the unfavorable functional outcome 3 months after stroke onset was compared with the National Institutes of Health Stroke Scale score and other known outcome predictors. The Lp(a) levels in those patients were obtained with a median value of 16.8 mg/dl (IQR, 9.5–34.4 mg/dl). At 3-month follow-up, an unfavorable functional outcome was found in 86 patients (37.1%). In multivariate models comparing the second (Q2), third, and fourth quartiles against the first quartile of Lp(a), concentrations of Lp(a) in Q2, Q3, and Q4 were associated with unfavorable outcome, and increased risk of unfavorable outcome by 42, 131, and 211%. Interestingly, an elevated Lp(a, > 30 mg/dl) was also associated with unfavorable outcome, and with adjusted OR of 2.25 (95% CI 1.39–3.68). The AUC was significantly increased by adding Lp(a) to established risk factors (difference, 0.041 [95% CI, 0.034–0.053]; P = 0.02). The addition of Lp(a) to established risk factors significantly improved net reclassification improvement and integrated discrimination improvement. Higher Lp(a) levels at admission were associated with increased risk of unfavorable functional outcome and might be useful in identifying stroke patients with T2D at risk for unfavorable functional outcome for early prevention strategies.

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Acknowledgements

We are grateful to the Department of Neurology and Emergency Department; the nurses, physicians, and patients who participated in our study; and the staff of the central laboratory of the Hospital.

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All authors have contributed significantly, and that all authors are in agreement with the content of the manuscript.

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Correspondence to Ping Zhang.

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The study was approved by the ethics committee of the First Affiliated Hospital of Xinxiang Medical University. The patients or their relatives gave written informed consents prior to entering the study.

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The authors declare that they have no conflict of interest.

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Wang, H., Zhao, J., Gui, Y. et al. Elevated Lipoprotein (a) and Risk of Poor Functional Outcome in Chinese Patients with Ischemic Stroke and Type 2 Diabetes. Neurotox Res 33, 868–875 (2018). https://doi.org/10.1007/s12640-017-9850-6

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  • DOI: https://doi.org/10.1007/s12640-017-9850-6

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