Liver resection for colorectal liver-limited metastases in elderly patients: a propensity score matching analysis
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(2020) 18:275
RESEARCH
Open Access
Liver resection for colorectal liver-limited metastases in elderly patients: a propensity score matching analysis Ke-Min Jin, Kun Wang, Quan Bao, Hong-Wei Wang and Bao-Cai Xing*
Abstract Background: Few studies have focused on the role of hepatectomy for colorectal liver-limited metastases in elderly patients compared to matched younger patients. Methods: From January 2000 to December 2018, 724 patients underwent hepatectomy for colorectal liver-limited metastases. Based on a 1:2 propensity score matching (PSM) model, 64 elderly patients (≥ 70 years of age) were matched to 128 younger patients (< 70 years of age) to obtain two balanced groups with regard to demographic, therapeutic, and prognostic factors. Results: There were 73 elderly and 651 younger patients in the unmatched cohort. Compared with the younger group (YG), the elderly group (EG) had significantly higher proportion of American Society of Anesthesiologists score III and comorbidities and lower proportion of more than 3 liver metastases and postoperative chemotherapy (p < 0.05). After PSM for these factors, rat sarcoma virus proto-oncogene/B-Raf proto-oncogene (RAS/BRAF) mutation status and primary tumor sidedness, the EG had significantly less median intraoperative blood loss than the YG (175 ml vs. 200 ml, p = 0.046), a shorter median postoperative hospital stay (8 days vs. 11 days, p = 0.020), and a higher readmission rate (4.7% vs.0%, p = 0.036). The EG also had longer disease-free survival (DFS), overall survival (OS), and cancer-specific survival (CSS) compared to the YG, but these findings were not statistically significant (p > 0.05). Old age was not an independent factor for DFS, OS, and CSS by Cox multivariate regression analysis (p > 0.05). Conclusions: Hepatectomy is safe for colorectal liver-limited metastases in elderly patients, and these patients may subsequently benefit from prolonged DFS, OS, and CSS. Keywords: Liver-limited metastases, Colorectal cancer, Elderly, Hepatectomy, Survival
* Correspondence: [email protected] Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Hepatobiliary and Pancreatic Surgery Unit I, Peking University Cancer Hospital & Institute, No. 52, Fu Cheng Road, Beijing 100142, People’s Republic of China © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to o
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