Efficacy of adjuvant chemotherapy with S-1 in stage II oral squamous cell carcinoma patients: A comparative study using the propensity score matching method

Ryoji Yoshida, Masashi Nagata, Akiyuki Hirosue, Kenta Kawahara, Masafumi Nakamoto, Masatoshi Hirayama, Nozomu Takahashi, Yuichiro Matsuoka, Junki Sakata, Hikaru Nakashima, Hidetaka Arita, Akimitsu Hiraki, Masanori Shinohara, Ken Kikuchi and Hideki Nakayama

PLOS ONE, 2020, vol. 15, issue 4, 1-16

Abstract: It has been reported that 20% of early-stage oral squamous cell carcinoma (OSCC) patients treated with surgery alone (SA) may exhibit postoperative relapse within 2–3 years and have poor prognoses. We aimed to determine the safety of S-1 adjuvant chemotherapy and the potential differences in the disease-free survival (DFS) between patients with T2N0 (stage II) OSCC treated with S-1 adjuvant therapy (S-1) and those treated with SA. This single-center retrospective cohort study was conducted at Kumamoto University, between April 2004 and March 2012, and included 95 patients with stage II OSCC. The overall cohort (OC), and propensity score-matched cohort (PSMC) were analyzed. In the OC, 71 and 24 patients received SA and S-1, respectively. The time to relapse (TTR), DFS, and overall survival were better in the S-1 group, but the difference was not significant. In the PSMC, 20 patients each received SA and S-1. The TTR was significantly lower in the S-1 group than in the SA group, while the DFS was significantly improved in the former. S-1 adjuvant chemotherapy may be more effective than SA in early-stage OSCC.

Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0231656

DOI: 10.1371/journal.pone.0231656

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