BACKGROUND: Glycated hemoglobin A1c (HbA1c) is a well-established marker for glycemic control
recent studies suggest its potential role in cancer prognosis. Understanding the relationship between preoperative HbA1c levels and lymph node metastasis (LNM) in diabetic women with endometrial cancer (EC) can enhance prognostic assessments and treatment strategies. OBJECTIVES: This study aimed to evaluate the predictive value of preoperative HbA1c levels for LNM in diabetic women with EC. MATERIAL AND METHODS: A retrospective analysis was conducted on 233 diabetic women who underwent surgery for endometrioid-type EC at a tertiary referral hospital between 2010 and 2021. Data collected included demographic information, fasting plasma glucose, HbA1c levels, ultrasound findings, and tumor characteristics. Receiver operating characteristic (ROC) analysis was used to assess the predictive power of HbA1c levels for LNM. Univariate and multivariate regression analyses were performed to identify independent risk factors for LNM. RESULTS: The mean preoperative HbA1c level was 7.03 ±1.37%. A cutoff HbA1c level ≥7.26% demonstrated a sensitivity of 73.7%, a specificity of 72.3% and an area under the curve (AUC) of 0.781 for predicting LNM (p <
0.001). Significant correlations were found between HbA1c levels and endometrial thickness (r = 0.231, p <
0.001), primary tumor diameter (PTD) (r = 0.173, p = 0.008) and duration of diabetes (r = 0.203, p = 0.002). Multivariate analysis identified HbA1c level (odds ratio (OR) = 2.621, 95% confidence interval (95% CI): 1.722-3.987, p <
0.001), lymphovascular space involvement (LVSI) (OR = 19.193, 95% CI: 5.805-63.458, p <
0.001), body mass index (BMI) (OR = 1.095, 95% CI: 1.010-1.188, p = 0.029), and duration of diabetes (OR = 1.019, 95% CI: 1.001-1.301, p = 0.039) as independent risk factors for LNM. CONCLUSIONS: Preoperative HbA1c levels serve as a significant predictor for LNM in diabetic women with EC. A cutoff HbA1c level ≥7.26% indicates higher risk of LNM. These findings underscore the importance of glycemic control in reducing cancer progression risks and improving the prognosis of diabetic patients with EC. Integrating HbA1c monitoring into preoperative assessments can help tailor personalized treatment strategies for better outcomes.