Evidence map›Paper›PMID 28727802›Full record

Observational studyPloS one2017

Diagnostic accuracy of procalcitonin, neutrophil-lymphocyte count ratio, C-reactive protein, and lactate in patients with suspected bacterial sepsis.

Lars Ljungström, Anna-Karin Pernestig, Gunnar Jacobsson, Rune Andersson, Barbara Usener, Diana Tilevik

Open access · goldAbstract readObservational Study
In one paragraph

Observational study in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 108 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
108citing papers in PubMed, 5 pooled it
11.9field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

108 citing papers in PubMed, 5 syntheses or guidelines pooled it, 214 citations in OpenAlex.

  1. Non-Infectious Causes for Elevated Procalcitonin.Medicina (Kaunas, Lithuania) · 2026
    Pooled it
  2. [S3 guideline on sepsis-prevention, diagnosis, therapy, and follow-up care-update 2025].Medizinische Klinik, Intensivmedizin und Notfallmedizin · 2025
    Guideline
  3. Pooled it
  4. Pooled it
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  12. Observational
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  16. MicroRNAs in sepsis: Advances in diagnosis and prognostic monitoring.World journal of critical care medicine · 2026
    Review
  17. Review
  18. Article
  19. Article
  20. From sepsis biomarker discovery to regulatedFrontiers in medical technology · 2026
    Review

48 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 2 countries.

Lars LjungströmDepartment of Infectious Diseases, Skaraborg Hospital, Skövde, Sweden.
Anna-Karin PernestigSystems Biology Research Centre, School of Bioscience, University of Skövde, Skövde, Sweden.
Gunnar JacobssonDepartment of Infectious Diseases, Skaraborg Hospital, Skövde, Sweden.
Rune AnderssonCARe-Center for Antibiotic Resistance Research, Gothenburg University, Gothenburg, Sweden.
Barbara UsenerDepartment of Clinical Chemistry, Unilabs AB, Skövde, Sweden.
Diana TilevikSystems Biology Research Centre, School of Bioscience, University of Skövde, Skövde, Sweden.ORCID http://orcid.org/0000-0002-8181-4131
University of Skövde · SECNR de la Résistance aux Antibiotiques · FRSahlgrenska University Hospital · SESkaraborg Hospital · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundEarly recognition is a key factor to achieve improved outcomes for septic patients. Combinations of biomarkers, as opposed to single ones, may improve timely diagnosis and survival. We investigated the performance characteristics of sepsis biomarkers, alone and in combination, for diagnosis of verified bacterial sepsis using Sepsis-2 and Sepsis-3 criteria, respectively.

methodsProcalcitonin (PCT), neutrophil-lymphocyte count ratio (NLCR), C-reactive protein (CRP), and lactate were determined in a total of 1,572 episodes of adult patients admitted to the emergency department on suspicion of sepsis. All sampling were performed prior to antibiotic administration. Discriminant analysis was used to construct two composite biomarkers consisting of linear combinations of the investigated biomarkers, one including three selected biomarkers (i.e., NLCR, CRP, and lactate), and another including all four (i.e., PCT, NLCR, CRP, and lactate). The diagnostic performances of the composite biomarkers as well as the individual biomarkers were compared using the area under the receiver operating characteristic curve (AUC).

resultsFor diagnosis of bacterial sepsis based on Sepsis-3 criteria, the AUC for PCT (0.68; 95% CI 0.65-0.71) was comparable to the AUCs for the both composite biomarkers. Using the Sepsis-2 criteria for bacterial sepsis diagnosis, the AUC for the NLCR (0.68; 95% CI 0.65-0.71) but not for the other single biomarkers, was equal to the AUCs for the both composite biomarkers. For diagnosis of severe bacterial sepsis or septic shock based on the Sepsis-2 criteria, the AUCs for both composite biomarkers were significantly greater than those of the single biomarkers (0.85; 95% CI 0.82-0.88 for the composite three-biomarker, and 0.86; 95% CI 0.83-0.89 for the composite four-biomarker).

conclusionsCombinations of biomarkers can improve the diagnosis of verified bacterial sepsis in the most critically ill patients, but in less severe septic conditions either the NLCR or PCT alone exhibit equivalent performance.

Indexed as

Leukocyte CountLymphocyte CountNeutrophilsAgedAged, 80 and overArea Under CurveBacteremiaBiomarkersCalcitoninC-Reactive ProteinDiscriminant AnalysisEarly DiagnosisFemaleHumansLactic AcidLinear ModelsBiomarkersCalcitoninC-Reactive ProteinLactic Acid

Identifiers

PMID28727802
PMCPMC5519182
OpenAlexW2737554657

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.