Additional file 13 of Preoperative profiles of plasma amino acids and derivatives distinguish periampullary cancer and benign disease

Additional file 13. Associations between selected clinical variables and metabolites and overall survival – Multivariable Cox regression. Multivariable Cox Regression model with stepwise regression algorithm with backwards elimination for patients with periampullary cancer (N = 64). Selection of variables based on univariable Cox regression model (Additional file 10). Patients that received neoadjuvant chemotherapy (N = 6), one patient with metastasis at the time of diagnosis and one patient with non-standard treatment regime were excluded. P-values < 0.05 are in bold. CI = Confidence Interval.