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0 0.5 1 1.5 2+ Case 1% Improvement Relative Risk c19zinc.com Louca et al. Zinc for COVID-19 Prophylaxis Favors zinc Favors control
Louca, 372,720 patient zinc prophylaxis study: 1% fewer cases [p=0.8] https://c19p.org/loucaz
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Modest effects of dietary supplements during the COVID-19 pandemic: insights from 445 850 users of the COVID-19 Symptom Study app
Louca et al., BMJ Nutrition, Prevention & Health, doi:10.1136/bmjnph-2021-000250 (preprint 11/30/20)
30 Nov 2020    Source   PDF   Share   Tweet
Survey analysis of dietary supplements showing no significant difference in PCR+ cases with zinc usage. These results are for PCR+ cases only, they do not reflect potential benefits for reducing the severity of cases. A number of biases could affect the results, for example users of the app may not be representative of the general population, and people experiencing symptoms may be more likely to install and use the app.
risk of case, 0.9% lower, RR 0.99, p = 0.80, odds ratio converted to relative risk, United Kingdom, all adjustment model.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Louca et al., 11/30/2020, retrospective, United Kingdom, Europe, peer-reviewed, 26 authors.
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