Purpose: The aim of this study was to clarify the influence of Charlson comorbidity index (CCI) on treatment options, and on short- and mid-term outcomes in esophageal cancer patients who underwent esophagectomy.
Methods: Patients who underwent curative-intent esophagectomy from 2009 to 2014 were classified by CCI. A CCI of ≥ 2 was defined as high, while a CCI of 0 or 1 was classified as low. Clinicopathological parameters, including overall survival (OS) and disease-specific survival (DSS), were compared between the groups.
Results: Among 548 patients, the most frequent comorbidity was chronic obstructive pulmonary disease (n = 142, 25.9%), followed by solid tumor (n = 79, 14.4%). A high CCI was significantly correlated with older age (P < 0.001), surgery alone (P = 0.020), a lower number of dissected lymph nodes (P < 0.001), lower rate of R0 resection (P = 0.048), and prolonged hospital stay (P < 0.001). In the low group, OS after surgery was favorable in comparison to the the high group. Although DSS was comparable between the groups, the CCI was significantly associated with a poor prognosis in patients with stage ≥ II disease.
Conclusions: The CCI was significantly correlated with the prognosis of esophageal cancer patients who underwent curative-intent esophagectomy.
Keywords: Comorbidity burden; Disease-specific survival; Overall survival.