COVID-19 studies:  C19 studies: C19:  IvermectinIVM Vitamin DV.D HC QHC Q Vitamin CV.C ZincZn PVP-IPVP-I FLVFLV REGNR2 LY-CoVLY RemdesivirRMD
HCQ study #174 of 259
11/4 Early treatment study
Cadegiani et al., medRxiv, doi:10.1101/2020.10.31.20223883 (Preprint)
Early COVID-19 Therapy with Azithromycin Plus Nitazoxanide, Ivermectin or Hydroxychloroquine in Outpatient Settings Significantly Reduced Symptoms Compared to Known Outcomes in Untreated Patients
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Comparison of HCQ, nitazoxanide, and ivermectin showing similar effectiveness for overall clinical outcomes in COVID-19 when used before seven days of symptoms, and overwhelmingly superior compared to the untreated COVID-19 population, even for those outcomes not influenced by placebo effect, at least when combined with azithromycin, and vitamin C, D and zinc in the majority of the cases.
585 patients with mean treatment delay 2.9 days. There was no hospitalization, mechanical ventilation, or mortality.
The size of the treatment groups in this trial can be found in [1].

Cadegiani et al., 11/4/2020, prospective, Brazil, South America, preprint, 4 authors, dosage 400mg days 1-5.
risk of death, 81.2% lower, RR 0.19, p = 0.21, treatment 0 of 159 (0.0%), control 2 of 137 (1.5%), control group 1.
risk of ventilation, 95.1% lower, RR 0.05, p < 0.001, treatment 0 of 159 (0.0%), control 9 of 137 (6.6%), control group 1.
risk of hospitalization, 98.3% lower, RR 0.02, p < 0.001, treatment 0 of 159 (0.0%), control 27 of 137 (19.7%), control group 1.

Effect extraction follows pre-specified rules prioritizing more serious outcomes. For an individual study the most serious outcome may have a smaller number of events and lower statistical signficance, however this provides the strongest evidence for the most serious outcomes when combining the results of many trials.
Details of all 259 studies    Meta analysis
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