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11 June 2019 : Clinical Research  

A Retrospective Propensity Score Matched Study of the Preoperative C-Reactive Protein to Albumin Ratio and Prognosis in Patients with Resectable Non-Metastatic Breast Cancer

Lin Zhou1B, Shihui Ma12C, Alpha Ibrahima Balde1E, Shuai Han1B, Zhai Cai1E, Zhou Li1A*

DOI: 10.12659/MSM.913684

Med Sci Monit 2019; 25:4342-4352

Abstract

BACKGROUND: A retrospective study aimed to investigate the association between the CRP to albumin ratio and prognosis in patients with resectable non-metastatic breast cancer in terms of disease-free survival (DFS) and overall survival (OS) using propensity score matching.

MATERIAL AND METHODS: Patients with newly diagnosed resectable non-metastatic breast cancer (n=200) who underwent modified radical mastectomy between January 2008 to June 2013 included a group with an increased CRP to albumin ratio ≥0.029 (n=80) and a group with reduced CRP to albumin ratio <0.029 (n=120). Propensity score matching was used to estimate the prognostic role of the CRP to albumin ratio, and a 1: 1 matching using four covariates was performed to overcome selection bias. The prognostic significance of the CRP to albumin ratio was analyzed using receiver operating characteristic (ROC) curves. Kaplan-Meier survival analysis and a Cox proportional hazards model were conducted to identify the impact on DFS and OS.

RESULTS: An increased CRP to albumin ratio was associated with increased age, post-menopausal status, and a high risk of recurrence or death in patients with breast cancer. An increased preoperative CRP to albumin ratio was significantly associated with reduced disease-free survival (DFS) and overall survival (OS) (all P<0.05). Multivariate analysis showed that an increased CRP to albumin ratio was an independent risk factor for long-term outcome and predicted reduced DFS (HR, 2.225; P=0.024) and OS (HR, 9.189; P=0.003).

CONCLUSIONS: Preoperative evaluation of the CRP to albumin ratio was an independent prognostic indicator in patients with resectable breast cancer.

Keywords: Breast Neoplasms, C-Reactive Protein, Disease-Free Survival, propensity score, Serum Albumin, Survival, Biomarkers, Tumor, Proportional Hazards Models, ROC Curve, Serum Albumin, Human

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750