Age and Charlson Comorbidity Index score are not independent risk factors for severe complications after curative esophagectomy for esophageal cancer: a Dutch population-based cohort study

Background: The number of older patients undergoing curative esophagectomy for esophageal cancer is increasing, and minimally invasive techniques are being increasingly used. The aim of this study is to compare postoperative outcomes after curative esophagectomy between older and younger patients. Methods: Data was retrieved from the Dutch Upper Gastrointestinal Cancer Audit (DUCA), a national surgical outcome registry. The primary outcome was severe complications, defined as complications graded ClavienDindo >= 3. The secondary outcomes were postoperative complications, reintervention rates, length of hospital stays, and mortality. Outcomes were compared between patients aged >= 75 and < 75 years. We performed additional subgroup analyses between these age groups after totally minimally invasive esophagectomy (TMIE) and in patients with severe complications. We adjusted for the following parameters: gender, BMI, Charlson Comorbidity Index score (CCI), ASA score, histology, type of neoadjuvant therapy, and surgical technique. Results: Of all 3775 included patients, 455 (12.1%) were aged >= 75 years and 3302 (87.9%) were aged <75 years. Overall, severe complications occurred in 184 (40.4%) older and in 1140 (34.5%) younger patients (CI = 1.009-1.080). After TMIE, severe complications occurred in 150 (42.1%) older and in 891 (35.8%) younger patients (CI = 1.007-1.088). In patients with severe complications, rates of complications, reinterventions, mortality, and ICU stays were comparable between older and younger patients. After adjustment for casemix, age and CCI score were not independent risk factors for (severe) complications and mortality. Conclusions: Age and Charlson Comorbidity Index are not adequate predictors of postoperative morbidity and mortality after curative esophagectomy for esophageal cancer.