Assessing the relationship between systemic immune-inflammation index and mortality in patients with hypertrophic cardiomyopathy

  • Ziqiong Wang Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China https://orcid.org/0000-0002-9777-2650
  • Haiyan Ruan Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China; and Department of Cardiology, Traditional Chinese Medicine Hospital of Shuangliu District, Chengdu, China
  • Liying Li Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
  • Xin Wei Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China; and Department of Cardiology and National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, China
  • Ye Zhu Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
  • Jiafu Wei Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
  • Xiaoping Chen Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
  • Sen He Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China https://orcid.org/0000-0002-0446-2865
Keywords: Systemic immuneinflammation index, all-cause mortality, hypertrophic cardiomyopathy, inflammation, risk stratification

Abstract

Background: This study investigates the predictive value of the systemic immune-inflammation index (SII), which was calculated as platelet × neutrophil/lymphocyte ratio, for all-cause mortality in patients with hypertrophic cardiomyopathy (HCM).

Methods: A total of 360 HCM patients were enrolled. They were divided into three groups based on the tertiles of baseline SII. The association between SII and all-cause mortality was analyzed.

Results: There were 53 HCM patients who died during a mean follow-up time of 4.8 years (min: 6 days and max: 10.8 years), and the mortality rate was 3.0 per 100 person years. The cumulative mortality rate was significantly different among the three tertiles of SII (P = 0.004), and the mortality rate in tertile 3 was much higher than that in the first two tertiles. In reference to tertile 1, the fully adjusted hazard ratios of all-cause mortality were 1.02 for the tertile 2 (95% confidence interval [CI]: 0.45–2.31, P = 0.966) and 2.31 for tertile 3 (95% CI: 1.10–4.87, P = 0.027). No significant interactions between SII and other variables were observed during subgroup analysis. The discriminative power was better for mid-term outcome than that for short-term or long-term outcomes. Sensitivity analyses including patients with normal platelet and white blood cell count have revealed similar results.

Conclusion: SII was a significant risk factor for all-cause mortality in HCM patients. However, the discriminative power was poor to moderate. It could be used in combination with other risk factors in mortality risk stratification in HCM.

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Published
2021-12-03
How to Cite
Wang, Z., Ruan, H., Li, L., Wei, X., Zhu, Y., Wei, J., Chen, X., & He, S. (2021). Assessing the relationship between systemic immune-inflammation index and mortality in patients with hypertrophic cardiomyopathy. Upsala Journal of Medical Sciences, 126(1). https://doi.org/10.48101/ujms.v126.8124
Section
Original Articles