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All Studies   All Outcomes   Recent:  
0 0.5 1 1.5 2+ Recovery time 15% Improvement Relative Risk Time to viral- 16% Time to viral- (b) 16% Paxlovid for COVID-19  Zhong et al.  EARLY TREATMENT Is early treatment with paxlovid beneficial for COVID-19? Retrospective 142 patients in China (April - May 2022) Faster viral clearance with paxlovid (p=0.009) Zhong et al., Frontiers in Medicine, Sep 2022 Favors paxlovid Favors control

The efficacy of paxlovid in elderly patients infected with SARS-CoV-2 omicron variants: Results of a non-randomized clinical trial

Zhong et al., Frontiers in Medicine, doi:10.3389/fmed.2022.980002, ChiCTR2200060700
Sep 2022  
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Retrospective 106 paxlovid and 36 control patients in China, showing faster viral clearance with treatment.
Confounding by contraindication. Hoertel et al. find that over 50% of patients that died had a contraindication for the use of Paxlovid Hoertel. Retrospective studies that do not exclude contraindicated patients may significantly overestimate efficacy.
Black box warning. The FDA notes that "severe, life-threatening, and/or fatal adverse reactions due to drug interactions have been reported in patients treated with paxlovid" FDA.
recovery time, 14.7% lower, relative time 0.85, p = 0.26, treatment mean 4.81 (±3.0) n=106, control mean 5.64 (±2.87) n=36.
time to viral-, 15.8% lower, relative time 0.84, p = 0.009, treatment mean 7.51 (±2.79) n=106, control mean 8.92 (±2.61) n=36, viral shedding after enrollment.
time to viral-, 16.1% lower, relative time 0.84, p = 0.001, treatment mean 9.32 (±2.78) n=106, control mean 11.11 (±2.67) n=36, first positive to first of two negative tests.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Zhong et al., 6 Sep 2022, retrospective, China, peer-reviewed, 12 authors, study period 24 April, 2022 - 28 May, 2022, trial ChiCTR2200060700.
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This PaperPaxlovidAll
The efficacy of paxlovid in elderly patients infected with SARS-CoV-2 omicron variants: Results of a non-randomized clinical trial
Weijie Zhong, Xiufeng Jiang, Xiaosheng Yang, Tiantong Feng, Zhixin Duan, Wei Wang, Zhaoliang Sun, Lingyan Chen, Xin Nie, Chuanlong Zhu, Wenchuan Zhang, Yi Li
Frontiers in Medicine, doi:10.3389/fmed.2022.980002
The efficacy of Paxlovid in elderly patients infected with SARS-CoV-2 omicron variants: Results of a non-randomized clinical trial.
Ethics statement The studies involving human participants were reviewed and approved by the Ethics Committee of the Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine (No. SH9H-2022-T112-2). Moreover, it was registered at the Chinese Clinical Trial Registry (ChiCTR2200060700). The patients/participants provided their written informed consent to participate in this study. Author contributions WJZ, XJ, XY, ZD, WW, ZS, WCZ, LC, and YL collected the epidemiological and clinical data. WCZ and YL were responsible for enrollment, clinical monitoring, funding, study conception and design, and revising and submitting the final manuscript. XY, ZD, XJ, and YL were responsible for the distribution and storage of medicines. WJZ, TF, XN, LC, CZ, YL, and WCZ were responsible for statistical data. WJZ, XJ, XY, TF, CZ, and YL drafted the manuscript. All authors contributed to the article and approved the submitted version. Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Publisher's note All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the..
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Please send us corrections, updates, or comments. Vaccines and treatments are complementary. All practical, effective, and safe means should be used based on risk/benefit analysis. No treatment, vaccine, or intervention is 100% available and effective for all current and future variants. We do not provide medical advice. Before taking any medication, consult a qualified physician who can provide personalized advice and details of risks and benefits based on your medical history and situation. FLCCC and WCH provide treatment protocols.
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