Risk Stratification Using Neoadjuvant Rectal Score in the Era of Neoadjuvant Chemoradiotherapy: Validation With Long-term Outcome Data

This study evaluated the role of neoadjuvant rectal score as a prognostic factor to stratify individual-level risks of survival and tumor recurrence. DESIGN: This is a retrospective study. SETTINGS: This study was conducted at the Seoul National University Hospital. PATIENTS: A total of 397 patients who underwent chemoradiotherapy plus total mesorectal excision were analyzed. INTERVENTIONS: There was no intervention. MAIN OUTCOME MEASURES: Harrell C statistic and receiver operating characteristic analysis, as well as Cox regression analysis, were used to assess the prognostic strength. RESULTS: The low (16) neoadjuvant rectal score groups included 91 (23%), 208 (52%), and 98 patients (25%). A high neoadjuvant rectal score was independently associated with inferior overall survival and disease-free survival (p = 0.011 and 0.008). Regarding the prognostic models adjusted for neoadjuvant rectal score (I) and ypT/N stage (II), the c-index was higher in model I (0.799 and 0.787, p = 0.009 for overall survival; 0.752 and 0.743, p = 0.093 for disease-free survival). The predictive ability of the neoadjuvant rectal score was superior to tumor regression grade, ypT, and ypN in the receiver operating characteristic analyses (p
Source: Diseases of the Colon and Rectum - Category: Gastroenterology Tags: Original Contributions: Colorectal Cancer Source Type: research