Background Data for: Evaluation of ambulance blood cultures in patients with suspected sepsis. A rural prospective cohort study

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Andersson, Lars-Jøran; Fredriksen, Knut; Solligård, Erik; Simonsen, Gunnar Skov, 2025, "Background Data for: Evaluation of ambulance blood cultures in patients with suspected sepsis. A rural prospective cohort study", https://doi.org/10.18710/EKPTQX, DataverseNO, V1

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Description	This dataset is extracted from an ambulance quality registry of patients with suspected sepsis managed by the ambulance department of the University Hospital of North Norway. The dataset contains data from patients with suspected sepsis who were subject to blood culture sampling before or after transport to hospital by ambulance from May 2018 to August 2022. The dataset was extracted to conduct a study on the value of blood cultures from patients with suspected sepsis drawn by ambulance personnel. The dataset contains demographic data and clinical data from both prehospital and in-hospital setting. The Regional Committee for Medical and Health Research Ethics Northern Norway (application number 685406) approved the present study. (2025-12-11) Related article abstract Purpose: To describe the epidemiology of blood cultures (BCs) drawn from patients with suspected sepsis by a rural ambulance service. Methods: Patients were included if they had clinically suspected sepsis and at least one BC was drawn. Variables associated with positive BCs were identified with logistic regression, culture results before and after ambulance antimicrobial therapy were compared and the susceptibility to empirical antimicrobial therapy in bacterial isolates was determined. Results: Among 392 included patients, sepsis severity scores were higher when BCs were positive than negative, but there was no significant difference in 30-day all-cause mortality between BC negative and positive patients. In 47 patients ambulance blood cultures were positive (47/347 (13,5%)). Fever (OR 1.54, 95% CI 1.11-2.15) and age (OR 1.01, 95% CI 1.00-1.04) was associated with higher odds of positive cultures, whereas lower respiratory tract infection was associated with lower odds of positive cultures (OR 0.10, 95% CI 0.04-0.30). In 205 patients who had both ambulance and hospital BCs drawn and received ambulance antimicrobial therapy, only the ambulance BCs were positive in 16 patients, whereas in 4 patients only hospital cultures were positive. Bacterial isolates from positive BCs were susceptible to the empirical antimicrobial regimen in 80% of cases. Conclusion: Positive ambulance BCs were associated with higher sepsis severity, and ambulance cultures were most useful in febrile patients with a suspected focus of infection other than the lower airways. Repeated BCs after hospital admission added only limited diagnostic value if an adequate ambulance BC had already been drawn. (2025-12-11)
Subject	Medicine, Health and Life Sciences
Keyword	Prehospital, Sepsis, Microbiology, Blood culture, Ambulance quality registry
Related Publication	Evaluation of ambulance blood cultures in patients with suspected sepsis. A rural prospective cohort study (unpublished manuscript)
License/Data Use Agreement	CC0 1.0

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Citation Metadata

Persistent Identifier	doi:10.18710/EKPTQX
Publication Date	2025-12-11
Title	Background Data for: Evaluation of ambulance blood cultures in patients with suspected sepsis. A rural prospective cohort study
Author	UiT The Arctic University of Norway0009-0002-4778-3156 UiT The Arctic University of Norway0000-0002-9281-8007 Norwegian University of Science and Technology0000-0001-6173-3580 UiT The Arctic University of Norway0000-0003-0043-7045
Point of Contact	Use email button above to contact. Andersson, Lars-Jøran (UiT The Arctic University of Norway)
Description	This dataset is extracted from an ambulance quality registry of patients with suspected sepsis managed by the ambulance department of the University Hospital of North Norway. The dataset contains data from patients with suspected sepsis who were subject to blood culture sampling before or after transport to hospital by ambulance from May 2018 to August 2022. The dataset was extracted to conduct a study on the value of blood cultures from patients with suspected sepsis drawn by ambulance personnel. The dataset contains demographic data and clinical data from both prehospital and in-hospital setting. The Regional Committee for Medical and Health Research Ethics Northern Norway (application number 685406) approved the present study. (2025-12-11) Related article abstract Purpose: To describe the epidemiology of blood cultures (BCs) drawn from patients with suspected sepsis by a rural ambulance service. Methods: Patients were included if they had clinically suspected sepsis and at least one BC was drawn. Variables associated with positive BCs were identified with logistic regression, culture results before and after ambulance antimicrobial therapy were compared and the susceptibility to empirical antimicrobial therapy in bacterial isolates was determined. Results: Among 392 included patients, sepsis severity scores were higher when BCs were positive than negative, but there was no significant difference in 30-day all-cause mortality between BC negative and positive patients. In 47 patients ambulance blood cultures were positive (47/347 (13,5%)). Fever (OR 1.54, 95% CI 1.11-2.15) and age (OR 1.01, 95% CI 1.00-1.04) was associated with higher odds of positive cultures, whereas lower respiratory tract infection was associated with lower odds of positive cultures (OR 0.10, 95% CI 0.04-0.30). In 205 patients who had both ambulance and hospital BCs drawn and received ambulance antimicrobial therapy, only the ambulance BCs were positive in 16 patients, whereas in 4 patients only hospital cultures were positive. Bacterial isolates from positive BCs were susceptible to the empirical antimicrobial regimen in 80% of cases. Conclusion: Positive ambulance BCs were associated with higher sepsis severity, and ambulance cultures were most useful in febrile patients with a suspected focus of infection other than the lower airways. Repeated BCs after hospital admission added only limited diagnostic value if an adequate ambulance BC had already been drawn. (2025-12-11)
Subject	Medicine, Health and Life Sciences
Keyword	Prehospital Sepsis Microbiology Blood culture Ambulance quality registry
Related Publication	Evaluation of ambulance blood cultures in patients with suspected sepsis. A rural prospective cohort study (unpublished manuscript)
Language	English
Producer	UiT The Arctic University of Norway (UiT) https://en.uit.no/
Funding Information	institutional funding
Distributor	UiT The Arctic University of Norway (UiT) https://dataverse.no/dataverse/uit
Depositor	Andersson, Lars-Jøran
Deposit Date	2025-06-13
Date of Collection	Start Date: 2018-05-01; End Date: 2022-08-01
Data Type	Observational data
Software	SPSS, Version: Version: 29.0.1.0
Related Dataset	Andersson, Lars-Jøran; Simonsen, Gunnar Skov; Solligård, Erik; Fredriksen, Knut, 2024, "Background data for: Pre-hospital identification of infection focus in sepsis and timely empirical antibiotic therapy in a rural ambulance service: A prospective cohort study", https://doi.org/10.18710/VGANVN, DataverseNO, V1; Andersson Lars-Jøran, 2024, "Background data for: Prehospital prediction of clinical course in patients with suspected sepsis", https://doi.org/10.18710/SWF7EZ, DataverseNO, V1
Data Source	This dataset is extracted from the ambulance quality registry on prehospital treatment of sepsis. The quality registry contains both prehospital data and data collected from hospital records. The open publication of anonymous data from the registry is approved by the ambulance service and the emergency medicine department at The University Hospital of North Norway.; Data was supplemented with antimicrobial susceptibility testing (AST) data from hospital records.

Geospatial Metadata

Geographic Coverage	Norway, Troms Norway, Nordland, Ofoten
Geographic Bounding Box	15.91 22.07 70.20 68.08

Social Science and Humanities Metadata

Unit of Analysis	Individuals
Universe	Patients with suspected sepsis who were subject to blood culture sampling before or after transport to hospital by ambulance
Time Method	Prospective cohort
Data Collector	The University Hospital of North Norway
Frequency	Data collected immediately after every episode
Sampling Procedure	Data were collected by ambulance personnel with the online survey tool Research Electronic Data Capture (REDCap, Vanderbilt University Nashville, USA). Pre-hospital data were supplemented by retrospective collection of in-hospital data from the electronic patient records at University Hospital of North Norway (UNN). Only cases where patients were subject to blood culture sampling before or after transport to hospital by ambulance were selected for this dataset.
Collection Mode	Online Survey

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