Univariate and multivariate analyses of prognostic factors associated with overall survival in patients with ductal carcinoma of the pancreas.

W/D, well differentiated tubular adenocarcinoma and papillary carcinoma; M/D, moderately differentiated.tubular adenocarcinoma; P/D, poorly differentaited adenocarcinoma.*Classified according to the classification of pancreatic carcinoma of Japan Pancreas Society.