Open Access

qSOFA should replace SIRS as the screening tool for sepsis

Critical Care201620:409

https://doi.org/10.1186/s13054-016-1562-4

Received: 6 September 2016

Accepted: 8 November 2016

Published: 28 December 2016

The original article was published in Critical Care 2016 20:210

Vincent JL, Martin GS and Levy MM recently wrote an article in Critical Care entitled “qSOFA does not replace SIRS in the definition of sepsis” [1]. In this paper they specified that “the qSOFA is meant to be used to raise suspicion of sepsis and prompt further action but it is not a replacement for SIRS and is not part of the definition of sepsis”.

One of the starting points that induced the Sepsis-3 consensus taskforce to set out in search of better entry criteria than the systemic inflammatory response syndrome (SIRS) criteria was precisely that SIRS criteria perform poorly on both “discriminant validity” and “convergent validity”[2]. In order to accomplish their task, they identified patients with suspected infection among 1.3 million health record cases and, after comparing the performance of several different clinical criteria, they came out with the quick sequential organ failure assessment (qSOFA) score, whose predictive validity for in-hospital mortality outside the ICU was statistically better than SIRS [3].

The fact that nonspecific SIRS criteria will “generally” continue to aid in the identification and diagnosis of infection was repeatedly affirmed in the Sepsis-3 consensus article [2]. Besides, when the SIRS criteria were first proposed as a screening tool for sepsis [4], they were meant to be applied to patients with “suspected infection”, just as the qSOFA is intended to be used now. However, while the SIRS criteria were essentially based only on expert-consensus [4], the qSOFA criteria were identified through large multivariate statistics and confirmatory analyses, where they proved to perform better than the SIRS criteria [3].

The qSOFA was derived and conceived on the basis of retrospective data, and thus, from now on, the clinical research should and will work hard to prospectively validate the soundness of this tool, in terms of its screening capacity. However, based at least on the currently available evidence, we believe that, although qSOFA does not replace SIRS in the definition of sepsis, it should indeed replace SIRS as the screening tool for sepsis.

We would like to know if Vincent and colleagues agree with this assumption, and we would also like to ask them if, after the Sepsis-3 consensus definitions, the SIRS criteria still retain a real operative role in the process of defining and/or screening sepsis or if they could be, at least operatively, dismissed.

Authors’ response

  • Jean-Louis Vincent,
  • Greg S. Martin and
  • Mitchell M. Levy
  • We thank Drs Franchini and Duca for their comments. Physicians have long used fever, associated tachycardia and altered white blood cell count as signs of infection … we have never needed the SIRS criteria to help with this and we don’t need the qSOFA for this either. Furthermore, qSOFA does not replace SIRS as a screening tool for sepsis because it was conceived, derived and validated as a prognostic tool. Moreover, sepsis is more often identified from associated unexplained organ dysfunction than from infection [5].

    The use of qSOFA as an alarm signal should be further validated, keeping in mind that it is not specific for sepsis. Patients with many other conditions, including severe heart failure, blood loss, pulmonary embolism and any form of acute circulatory failure (shock), can have hypotension, altered mental status and hyperventilation, thus meeting the qSOFA criteria without having sepsis. But, it is still important to identify these patients and act quickly, whatever the underlying cause. The best screening tools for sepsis remain within the minds of clinicians, suspecting infection and assessing organ function using an array of criteria that so far have eluded complete description.

    Notes

    Abbreviations

    qSOFA: 

    quick sequential organ failure assessment

    SIRS: 

    systemic inflammatory response syndrome

    Declarations

    Acknowledgements

    None.

    Funding

    The authors certify that no funding has been received for the conception and writing of this article.

    Availability of data and materials

    Not applicable.

    Authors’ contributions

    SF was responsible for conception of the letter, and drafted and revised the manuscript. AD conceived the letter and helped to draft the manuscript. All authors read and approved the final manuscript.

    Authors’ information

    Both SF and AD are emergency physicians working full-time in the Emergency Department and are involved in their institution’s teaching program regarding sepsis for physicians and nurses.

    Competing interests

    The authors declare that they have no competing interest.

    Consent for publication

    Not applicable.

    Ethical approval and consent to participate

    Not applicable.

    Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

    Authors’ Affiliations

    (1)
    Emergency Department, Ospedale San Raffaele Scientific Institute

    References

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    Copyright

    © The Author(s). 2016

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