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All Studies   Meta Analysis   Recent: 
0 0.5 1 1.5 2+ Hospitalization 30% Improvement Relative Risk Recovery 2% Recovery (b) -10% Time to viral- 29% no CI Time to viral- (b) 14% no CI Viral clearance 38% Viral clearance (b) 20% c19hcq.org Johnston et al. NCT04354428 HCQ RCT LATE TREATMENT Favors HCQ Favors control
Hydroxychloroquine with or Without Azithromycin for Treatment of Early SARS-CoV-2 Infection Among High-Risk Outpatient Adults: A Randomized Clinical Trial
Johnston et al., EClinicalMedicine, doi:10.1016/j.eclinm.2021.100773 (date from earlier preprint), NCT04354428 (history)
9 Dec 2020    Source   PDF   Share   Tweet
Small early terminated late treatment RCT comparing vitamin C + folic acid, HCQ + folic acid, and HCQ+AZ, showing non-statistically significantly lower hospitalization with HCQ/HCQ+AZ, and faster viral clearance with HCQ. Enrollment was a median of 5.9 days after onset (6.2 and 6.3 in the treatment arms).
The median time to viral clearance for vitamin C + folic acid was 8 days in the preprint but changed to 7 days in the published paper without explanation.
Low risk patients, median age 37, no deaths (not matching the title which claims "high risk"). Post hoc addition of a new Ct threshold to obscure the statistically significant faster clearance. No analysis for time from symptom onset. Authors identify (relatively) low and high risk cohorts, but do not provide either viral shedding or symptom resolution results for the cohorts. NCT04354428 (history). For other issues see [twitter.com].
risk of hospitalization, 29.9% lower, RR 0.70, p = 0.73, treatment 5 of 148 (3.4%), control 4 of 83 (4.8%), NNT 69, HCQ + folic acid and HCQ + AZ vs. vitamin C + folic acid.
risk of no recovery, 2.0% lower, RR 0.98, p = 0.95, treatment 30 of 60 (50.0%), control 34 of 72 (47.2%), adjusted per study, inverted to make RR<1 favor treatment, HCQ + folic acid vs. vitamin C + folic acid.
risk of no recovery, 9.9% higher, RR 1.10, p = 0.70, treatment 34 of 65 (52.3%), control 34 of 72 (47.2%), adjusted per study, inverted to make RR<1 favor treatment, HCQ + AZ vs. vitamin C + folic acid.
time to viral-, 28.6% lower, relative time 0.71, treatment 49, control 52, median time, HCQ + folic acid vs. vitamin C + folic acid.
time to viral-, 14.3% lower, relative time 0.86, treatment 51, control 52, median time, HCQ + AZ vs. vitamin C + folic acid.
risk of no viral clearance, 38.3% lower, RR 0.62, p = 0.047, treatment 6 of 49 (12.2%), control 12 of 52 (23.1%), NNT 9.2, adjusted per study, inverted to make RR<1 favor treatment, HCQ + folic acid vs. vitamin C + folic acid.
risk of no viral clearance, 20.0% lower, RR 0.80, p = 0.49, treatment 11 of 51 (21.6%), control 12 of 52 (23.1%), adjusted per study, inverted to make RR<1 favor treatment, HCQ + AZ vs. vitamin C + folic acid.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Johnston et al., 9 Dec 2020, Randomized Controlled Trial, USA, peer-reviewed, 30 authors, average treatment delay 5.9 days, dosage 400mg bid day 1, 200mg bid days 2-10, trial NCT04354428 (history).
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Late treatment
is less effective
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