A novel predictor for the use of concurrent chemotherapy in early-stage cervical cancer with intermediate-risk factors.

e17521 Background: For early-stage cervical cancer patients experiencing radical surgery, postoperative radiotherapy was recommended for patients with a combination of intermediate-risk factors. However, there was no consensus on whether to administer concurrent chemotherapy. The aim of the study was to confirm the clinical value of the controlling nutritional status (COUNT) score in guiding the use of concurrent chemotherapy in patients with early-stage cervical cancers during postoperative radiotherapy. Methods: A total of 945 patients with FIGO stage IB-IIA (2009) cervical cancer were retrospectively analyzed in the study from 2009 to 2018. There were 503 patents receiving concurrent chemoradiotherapy, while another 442 patents undergone radiotherapy lonely. Radiotherapy was performed by conformal radiotherapy or intensity-modulated radiotherapy. The concurrent chemotherapy regimen included either cisplatin or paclitaxel. Pre-treatment CONUT score were calculated within 1 weeks before curative resection. Low CONUT group and high CONUT group were defined based on the cutoff value of CONUT score which was determined by the receiver operating characteristic analysis. Kaplan-Meier survival analysis was performed to compare disease-free survival (DFS) and cancer-specific survival (CSS) rates between different group. A Cox proportional hazards regression test was used to conduct multivariate analyses of DFS, local recurrence-free survival and distant metastasis-free survival (DMFS). Results: The median follow-up was 54.6 months (range: 4.8-147.5 months). The optimal cutoff value of CONUT was 3 in the study. For the patients included in the high CONUT group (≥3), the addition of concurrent chemotherapy significantly improved treatment outcomes, and had better 5-year DFS (90.37% vs 70.69%, P < 0.001) and CSS (95.02% vs 78.74%, P = 0.005) than those without it. Meanwhile, the patients with concurrent chemotherapy had less rate of distant metastasis (6.5% vs 28.1%, P < 0.001). For the patients included in low CONUT group (< 3), there was no difference in prognosis between patients receiving concurrent chemotherapy and not receiving. In the high CONUT group, the multivariate analysis showed that concurrent chemotherapy was detected to be a factor significantly associated with DFS (HR 3.077; 95% CI: 1.295-6.679, P = 0.011) and DMFS (HR 3.435; 95% CI: 1.506-7.014, P = 0.006). Conclusions: Pre-treatment CONUT score may be a predictive factor for the use of concurrent chemotherapy in early-stage cervical cancer patients with intermediate-risk factors during postoperative radiotherapy, and it can be helpful to determine the adjuvant treatment scheme.