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0 0.5 1 1.5 2+ Symptomatic case 45% Improvement Relative Risk Case 31% c19pvpi.com Seet et al. NCT04446104 Povidone-Iod.. RCT Prophylaxis Favors povidone-iodine Favors vitamin C
Seet, 1,354 patient povidone-iodine prophylaxis RCT: 45% fewer symptomatic cases [p=0.002] and 31% fewer cases [p=0.01] https://c19p.org/seetp
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Positive impact of oral hydroxychloroquine and povidone-iodine throat spray for COVID-19 prophylaxis: an open-label randomized trial
Seet et al., International Journal of Infectious Diseases, doi:10.1016/j.ijid.2021.04.035, NCT04446104 (history)
14 Apr 2021    Source   PDF   Share   Tweet
Prophylaxis RCT in Singapore with 3,037 low risk patients, showing lower serious cases, lower symptomatic cases, and lower confirmed cases of COVID-19 with all treatments (ivermectin, HCQ, PVP-I, and Zinc + vitamin C) compared to vitamin C.
Meta-analysis of vitamin C in 6 previous trials shows a benefit of 16%, so the actual benefit of ivermectin, HCQ, and PVP-I may be higher. Cluster RCT with 40 clusters.
There were no hospitalizations and no deaths. NCT04446104 (history).
risk of symptomatic case, 44.7% lower, RR 0.55, p = 0.002, treatment 42 of 735 (5.7%), control 64 of 619 (10.3%), NNT 22.
risk of case, 31.1% lower, RR 0.69, p = 0.01, treatment 338 of 735 (46.0%), control 433 of 619 (70.0%), NNT 4.2, adjusted per study, odds ratio converted to relative risk, model 6.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Seet et al., 14 Apr 2021, Cluster Randomized Controlled Trial, Singapore, peer-reviewed, 15 authors, this trial compares with another treatment - results may be better when compared to placebo, trial NCT04446104 (history).
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