Novel Systemic Inflammatory Markers Predict All-Cause Mortality in Patients Undergoing Endovascular Abdominal Aortic Aneurysm Repair

Wen-Xin Zhao; Zhi-Yuan Wu; Ning Zhao; Yong-Peng Diao; Yong Lan; Yong-Jun Li

doi:10.31083/j.rcm2506202

Novel Systemic Inflammatory Markers Predict All-Cause Mortality in Patients Undergoing Endovascular Abdominal Aortic Aneurysm Repair

Rev Cardiovasc Med. 2024 May 31;25(6):202. doi: 10.31083/j.rcm2506202. eCollection 2024 Jun.

Authors

Wen-Xin Zhao^{1

2}, Zhi-Yuan Wu¹, Ning Zhao^{1

2}, Yong-Peng Diao^{1

2}, Yong Lan^{1

2}, Yong-Jun Li^{1

2}

Affiliations

¹ Department of Vascular Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, 100010 Beijing, China.
² Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, 100010 Beijing, China.

Abstract

Background: Clinically useful predictors for risk stratification of long-term survival may assist in selecting patients for endovascular abdominal aortic aneurysm (EVAR) procedures. This study aimed to analyze the prognostic significance of peroperative novel systemic inflammatory markers (SIMs), including the neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), hemoglobin-to-red cell distribution width ratio (HRR), systemic immune-inflammatory index (SIII), and systemic inflammatory response index (SIRI), for long-term mortality in EVAR.

Methods: A retrospective analysis was performed on 147 consecutive patients who underwent their first EVAR procedure at the Department of Vascular Surgery, Beijing Hospital. The patients were divided into the mortality group (n = 37) and the survival group (n = 110). The receiver operating characteristic curves were used to ascertain the threshold value demonstrating the most robust connection with mortality. The Kaplan-Meier survival analysis was performed between each SIM and mortality. The relationship between SIMs and survival was investigated using restricted cubic splines and multivariate Cox regression analysis.

Results: The study included 147 patients, with an average follow-up duration of 34.28 $\pm$ 22.95 months. Deceased patients showed significantly higher NLR (p $<$ 0.001) and reduced HRR (p $<$ 0.001). The Kaplan-Meier estimates of mortality were considerably greater in the higher-NLR group (NLR $>$ 2.77) and lower-HRR group (HRR $<$ 10.64). The hazard ratio (HR) of 0.833 (95% confidence interval (95% CI): 0.71-0.97, p $<$ 0.021) was determined to be statistically significant in predicting death in the multivariable analysis.

Conclusions: Preoperative higher-NLR and lower-HRR have been associated with a lower long-term survival rate in abdominal aortic aneurysm (AAA) patients undergoing elective EVAR. Multivariate Cox regression showed that decreased preoperative HRR is an independent risk factor that increases mortality risk following EVAR. SIMs, such as the NLR and HRR, could be used in future clinical risk prediction methodologies for AAA patients undergoing EVAR. However, additional prospective cohort studies are needed to identify these findings.

Keywords: abdominal aortic aneurysm; all-cause mortality; hemoglobin-to-red-cell distribution width ratio; novel systemic inflammatory markers.

Grants and funding

This research was funded by the National High Level Hospital Clinical Research Funding (No. BJ-2021-205); the National Key Research and Development Project of China (No. 2020YFC2008003); the Beijing Hospital Clinical Research 121 Project (No. BJ-2018-089); CAMS Innovation Fund for Medical Sciences (CIFMS. 2021-I2M-1-050); PUMC Discipline Construction Project (No. 201920102101).