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HCQ study #153 of 231
10/15 Late treatment study
SOLIDARITY Trial Consortium, NEJM, doi:10.1056/NEJMoa2023184 (preprint 10/15) (Peer Reviewed)
Repurposed antiviral drugs for COVID-19; interim WHO SOLIDARITY trial results
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WHO SOLIDARITY open-label trial with 954 very late stage (64% on oxygen/ventilation) HCQ patients, mortality relative risk RR 1.19 [0.89-1.59], p=0.23.
HCQ dosage very high as in RECOVERY, 1.6g in the first 24 hours, 9.6g total over 10 days, only 25% less than the high dosage that Borba et al. show greatly increases risk (OR 2.8) [1].
Authors state they do not know the weight or obesity status of patients to analyze toxicity (since they do not adjust dosage based on patient weight, toxicity may be higher in patients of lower weight).
KM curves show a spike in HCQ mortality days 5-7, corresponding to ~90% of the total excess seen at day 28 (a similar spike is seen in the RECOVERY trial).
Almost all excess mortality is from ventilated patients.
Authors refer to a lack of excess mortality in the first few days to suggest a lack of toxicity, but they are ignoring the very long half-life of HCQ and the dosing regimen - much higher levels of HCQ will be reached later. Increased mortality in Borba et al. occurred after 2 days.
An unspecified percentage used the more toxic CQ. No placebo used.

SOLIDARITY et al., 10/15/2020, Randomized Controlled Trial, multiple countries, multiple regions, peer-reviewed, baseline oxygen requirements 64.0%, 15 authors.
risk of death, 19.0% higher, RR 1.19, p = 0.23, treatment 104 of 947 (11.0%), control 84 of 906 (9.3%).
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