Not applicable.
Funding
This work was supported by the Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Availability of data and materials
The raw data supporting the findings will be shared upon request to the corresponding author.
Authors’ contributions
SS: conceived and designed the study, was responsible for acquisition of data, performed the statistical analyses, was responsible for data analysis and interpretation, drafted the manuscript. SRL: was responsible for acquisition of data, performed the statistical analyses, was responsible for data analysis and interpretation, critically revised the manuscript for important intellectual content. LB: conceived and designed the study, was responsible for data analysis and interpretation, critically revised the manuscript for important intellectual content, supervised the study. MG: was responsible for data analysis and interpretation, critically revised the manuscript for important intellectual content. PCR: was responsible for acquisition of data, was responsible for data analysis and interpretation, critically revised the manuscript for important intellectual content. FB: was responsible for data analysis and interpretation, critically revised the manuscript for important intellectual content. DR: was responsible for data analysis and interpretation, critically revised the manuscript for important intellectual content. BS: conceived and designed the study, was responsible for data analysis and interpretation, drafted the manuscript, supervised the study. All authors read and approved the final version of the manuscript and are agree to be accountable for all aspects of the work.
Authors’ information
SS: Resident, Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, suedfeld.research@gmx.de
SRL: Resident, Martini Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, s.bannurah@googlemail.com
LB: Consultant, Martini Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, lars.budaeus@gmail.com
MG: Head consultant, Professor, Martini Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, graefen@uke.de
PCR: research assistant, Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, reese.research@gmx.de
FVB: Consultant, Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, f.breunig@uke.de
DAR: Head Consultant, Professor, Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, dreuter@uke.de
BS: Internal medicine specialist, Resident, Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany, b.saugel@uke.de
Competing interests
The authors declare that they have no competing interests.
Consent for publication
There are no details, images or videos relating to individual participants included in this publication. Therefore, consent for publication was waived.
Ethics approval and consent to participate
The study protocol (ethics committee number PV4998) was reviewed and approved by the appropriate ethics committee (Ethikkommission der Ärztekammer Hamburg, Hamburg, Germany). Due to the retrospective nature of the study and the anonymisation of data the need for informed consent was waived by the ethics committee.