Dataset Information

Real-World Experience of Bamlanivimab for Coronavirus Disease 2019 (COVID-19): A Case-Control Study.

ABSTRACT:

Background

Coronavirus disease 2019 (COVID-19) has strained healthcare systems with patient hospitalizations and deaths. Anti-spike monoclonal antibodies, including bamlanivimab, have demonstrated reduction in hospitalization rates in clinical trials, yet real-world evidence is lacking.

Methods

We conducted a retrospective case-control study across a single healthcare system of nonhospitalized patients, age 18 years or older, with documented positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) testing, risk factors for severe COVID-19, and referrals for bamlanivimab via emergency use authorization. Cases were defined as patients who received bamlanivimab; contemporary controls had a referral order placed but did not receive bamlanivimab. The primary outcome was 30-day hospitalization rate from initial positive SARS-CoV-2 polymerase chain reaction (PCR). Descriptive statistics, including χ 2 and Mann-Whitney U test, were performed. Multivariable logistic regression was used for adjusted analysis to evaluate independent associations with 30-day hospitalization.

Results

Between 30 November 2020 and 19 January 2021, 218 patients received bamlanivimab (cases), and 185 were referred but did not receive drug (controls). Thirty-day hospitalization rate was significantly lower among patients who received bamlanivimab (7.3% vs 20.0%, risk ratio [RR] 0.37, 95% confidence interval [CI]: .21-.64, P < .001), and the number needed to treat was 8. On logistic regression, odds of hospitalization were increased in patients not receiving bamlanivimab and with a higher number of pre-specified comorbidities (odds ratio [OR] 4.19 ,95% CI: 1.31-2.16, P < .001; OR 1.68, 95% CI: 2.12-8.30, P < .001, respectively).

Conclusions

Ambulatory patients with COVID-19 who received bamlanivimab had a lower 30-day hospitalization than control patients in real-world experience. We identified receipt of bamlanivimab and fewer comorbidities as protective factors against hospitalization.Bamlanivimab's role in preventing hospitalization associated with coronavirus disease 2019 (COVID-19) remains unclear. In a real-world, retrospective study of 403 high-risk, ambulatory patients with COVID-19, receipt of bamlanivimab compared to no monoclonal antibody therapy was associated with lower 30-day hospitalization.

SUBMITTER: Kumar RN

PROVIDER: S-EPMC8083260 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:ObjectiveTo characterize associations between exposures within and outside the medical workplace with healthcare personnel (HCP) SARS-CoV-2 infection, including the effect of various forms of respiratory protection.DesignCase-control study.SettingWe collected data from international participants via an online survey.ParticipantsIn total, 1,130 HCP (244 cases with laboratory-confirmed COVID-19, and 886 controls healthy throughout the pandemic) from 67 countries not meeting prespecified exclusion (ie, healthy but not working, missing workplace exposure data, COVID symptoms without lab confirmation) were included in this study.MethodsRespondents were queried regarding workplace exposures, respiratory protection, and extra-occupational activities. Odds ratios for HCP infection were calculated using multivariable logistic regression and sensitivity analyses controlling for confounders and known biases.ResultsHCP infection was associated with non-aerosol-generating contact with COVID-19 patients (adjusted OR, 1.4; 95% CI, 1.04-1.9; P = .03) and extra-occupational exposures including gatherings of ?10 people, patronizing restaurants or bars, and public transportation (adjusted OR range, 3.1-16.2). Respirator use during aerosol-generating procedures (AGPs) was associated with lower odds of HCP infection (adjusted OR, 0.4; 95% CI, 0.2-0.8, P = .005), as was exposure to intensive care and dedicated COVID units, negative pressure rooms, and personal protective equipment (PPE) observers (adjusted OR range, 0.4-0.7).ConclusionsCOVID-19 transmission to HCP was associated with medical exposures currently considered lower-risk and multiple extra-occupational exposures, and exposures associated with proper use of appropriate PPE were protective. Closer scrutiny of infection control measures surrounding healthcare activities and medical settings considered lower risk, and continued awareness of the risks of public congregation, may reduce the incidence of HCP infection.