Small prophylaxis RCT with 113 patients showing fewer cases with quercetin + vitamin C + bromelain prophylaxis. NCT04377789
. Note that this paper disappeared from SSRN without explanation.
risk of case, 91.7% lower, RR 0.08, p = 0.03, treatment 1 of 71 (1.4%), control 9 of 42 (21.4%), NNT 5.0, adjusted per study.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
This study is excluded in the after exclusion results of meta
paper no longer available at the source, and contact does not reply to queries.
Arslan et al., 11/16/2020, Randomized Controlled Trial, Turkey, Europe, preprint, 7 authors, this trial uses multiple treatments in the treatment arm (combined with vitamin C and bromelain) - results of individual treatments may vary.