Clinical Outcomes in Hospitalized Vaccine-Breakthrough Coronavirus Disease 2019 Cases Compared With Contemporary Unvaccinated Hospitalized Adults

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Abstract

The inactivatedsevere acute respiratory syndrome coronavirus 2 vaccine (CoronaVac) has been the principal vaccine used in Chile’s prebooster immunization campaign. We compared major outcomes in 206 hospitalized vaccinated adults vs 507 unvaccinated adults (mid-2021). Individuals in the vaccinated group were much older, required less critical care, had lower mortality (adjusted by age), and had shorter hospitalization than those in the unvaccinated group. Benefits were most pronounced in those ≥60years of age.

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  1. SciScore for 10.1101/2022.02.07.22270555: (What is this?)

    Please note, not all rigor criteria are appropriate for all manuscripts.

    Table 1: Rigor

    EthicsIRB: Our local ethics committee authorized use of these data for outcomes research and waived the need for informed consent, under conditions guaranteeing data confidentiality and patient anonymity.
    Consent: Our local ethics committee authorized use of these data for outcomes research and waived the need for informed consent, under conditions guaranteeing data confidentiality and patient anonymity.
    Sex as a biological variablenot detected.
    Randomizationnot detected.
    Blindingnot detected.
    Power Analysisnot detected.

    Table 2: Resources

    Software and Algorithms
    SentencesResources
    Quantitative variables were compared by Student’s t test and categorical variables were analyzed with proportional Z tests using Stata® 13 (StataCorp LLC, College Station, TX, USA) software.
    StataCorp
    suggested: (Stata, RRID:SCR_012763)

    Results from OddPub: We did not detect open data. We also did not detect open code. Researchers are encouraged to share open data when possible (see Nature blog).


    Results from LimitationRecognizer: We detected the following sentences addressing limitations in the study:
    Limitations of our study include a lack of evaluation of comorbidities and viral variants, being a single-site study, risk of patient’s profile not being an accurate representation of the COVID-19 population at large and portraying a situation prior to the Omicron surge. Our design does not evaluate the decline of preventive effects of the CoronaVac over time. However, we believe that Chilean data are reassuring to China and LMICs since there are many countries with vaccination programs in their infancy that are or have been heavily dependent on inactivated vaccines. The global community may wish to consider mRNA boosters for persons with primary vaccination with inactivated vaccines, given highly favorable immunological results of this combination noted from the Dominican Republic (9) and enhanced preventive effectiveness from Chile (10).

    Results from TrialIdentifier: No clinical trial numbers were referenced.


    Results from Barzooka: We did not find any issues relating to the usage of bar graphs.


    Results from JetFighter: We did not find any issues relating to colormaps.


    Results from rtransparent:
    • Thank you for including a conflict of interest statement. Authors are encouraged to include this statement when submitting to a journal.
    • Thank you for including a funding statement. Authors are encouraged to include this statement when submitting to a journal.
    • No protocol registration statement was detected.

    Results from scite Reference Check: We found no unreliable references.


    About SciScore

    SciScore is an automated tool that is designed to assist expert reviewers by finding and presenting formulaic information scattered throughout a paper in a standard, easy to digest format. SciScore checks for the presence and correctness of RRIDs (research resource identifiers), and for rigor criteria such as sex and investigator blinding. For details on the theoretical underpinning of rigor criteria and the tools shown here, including references cited, please follow this link.