Abstract
Purpose
No study has evaluated the prognostic impact of the age-adjusted Charlson comorbidity index (AACI) in those with renal cell carcinoma (RCC). This study aimed to evaluate the utility of the AACI for predicting long-term survival in patients with surgically treated non-metastatic clear cell RCC (ccRCC).
Methods
Data from 698 patients with non-metastatic ccRCC who underwent radical or partial nephrectomy as primary therapy from a multi-institutional Korean collaboration between 1988 and 2015 were retrospectively analyzed. Clinicopathological variables and survival outcomes of those with AACI scores ≤ 3 (n = 324), 4–5 (n = 292), and ≥ 6 (n = 82) were compared.
Results
Patients with a high AACI score were older and more likely to be female. They were also more likely to have diabetes or hypertension, a worse Eastern Cooperative Oncology Group performance status, and lower preoperative hemoglobin, albumin, serum calcium, and serum total cholesterol levels. Regarding pathologic features, a high AACI score was associated with advanced stage. Kaplan–Meier analyses revealed that AACI ≥ 6 was associated with shorter cancer-specific (log-rank test, P < 0.001) and overall survival (log-rank test, P < 0.001), but not with recurrence-free survival (log-rank test, P = 0.134). Multivariate Cox regression analyses identified an AACI score as an independent predictor of overall survival (hazard ratio, 6.870; 95% confidence interval, 2.049–23.031; P = 0.002). The AACI score was a better discriminator of overall survival than the Charlson comorbidity index score.
Conclusions
AACI scores may enable more tailored, individualized management strategies for patients with surgically treated non-metastatic ccRCC.
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Funding
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (2018R1D1A1B07043906).
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Conception and study design: HWK and YJK. Acquisition of data: SMK, WTK, and SJY. Statistical analysis: SMK, WTK and SJY. Drafting and writing of the manuscript: HWK. Revision and critical review of the manuscript: S-CL, W-JK, ECH, SHK, S-HH, JC, TGK, HHK, CK, S-SB, and Y-JK. Manuscript approval: all authors.
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432_2019_3042_MOESM1_ESM.jpg
Supplementary material 1 Supplementary Fig. Kaplan–Meier survival curves showing (a) cancer-specific survival, and (b) overall survival according to pathologic T stages (pT < 2 vs. ≥ 2) (JPEG 454 kb)
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Kang, H.W., Kim, S.M., Kim, W.T. et al. The age-adjusted Charlson comorbidity index as a predictor of overall survival of surgically treated non-metastatic clear cell renal cell carcinoma. J Cancer Res Clin Oncol 146, 187–196 (2020). https://doi.org/10.1007/s00432-019-03042-7
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DOI: https://doi.org/10.1007/s00432-019-03042-7