Observational cohort study.

The aim is to investigate the association between preoperative anemia and long-term all-cause mortality after coronary artery bypass grafting.

This project is a part of the collaboration between the Department of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, Aarhus, Denmark, the Department of Cardiothoracic Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden, and the Department of Cardiothoracic Surgery, Landspitali University Hospital, Reykjavik, Iceland.

• Alexander Emil Kaspersen, MD
  Department of Cardiothoracic and Vascular Surgery and Department of Clinical Medicine, Aarhus University Hospital and Aarhus University, Denmark.
• Susanne Nielsen, RN, PhD, Associate Professor
  Department of Cardiothoracic Surgery and Department of Molecular and Clinical Medicine, Sahlgrenska University Hospital and Gothenburg University, Gothenburg, Sweden.
• Ivy Susanne Modrau, MD, Associate Professor, Consultant
  Department of Cardiothoracic and Vascular Surgery and Department of Clinical Medicine, Aarhus University Hospital and Aarhus University, Denmark
• Alexandra Aldis Heimisdottir, MD
  Department og Cardiothoracic Surgery, Landspitality University Hospital, Reykjavik, Iceland.
• Tomas Gudbjartsson, MD, PhD, Professor, Consultant
  Department og Cardiothoracic Surgery and Faculty of Medicine, Landspitality University Hospital and University of Iceland, Reykjavik, Iceland.
• Anders Jeppsson, MD, PhD, Professor, Consultant
  Department of Cardiothoracic Surgery and Department of Molecular and Clinical Medicine, Sahlgrenska University Hospital and Gothenburg University, Gothenburg, Sweden.