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0 0.5 1 1.5 2+ Hospitalization 80% Improvement Relative Risk Case 74% primary c19ivm.org Morgenstern et al. NCT04832945 Ivermectin Prophylaxis Favors ivermectin Favors control
Ivermectin as a SARS-CoV-2 Pre-Exposure Prophylaxis Method in Healthcare Workers: A Propensity Score-Matched Retrospective Cohort Study
Morgenstern et al., Cureus, doi:10.7759/cureus.17455 (date from earlier preprint), NCT04832945 (history)
16 Apr 2021    Source   PDF   Share   Tweet
Propensity matched retrospective prophylaxis study of healthcare workers in the Dominican Republic showing significantly lower cases with treatment, and no hospitalization with treatment (versus 2 in the PSM matched control group). The cases with treatment were mostly in the first week, with only one case in the second and third weeks, and none in the fourth week. There were no severe side effects. In post-hoc analysis, as the treatment group discontinued treatment over time, their protection also decreased. NCT04832945 (history).
risk of hospitalization, 80.0% lower, RR 0.20, p = 0.50, treatment 0 of 271 (0.0%), control 2 of 271 (0.7%), NNT 136, relative risk is not 0 because of continuity correction due to zero events (with reciprocal of the contrasting arm), PSM.
risk of case, 74.0% lower, RR 0.26, p = 0.008, treatment 5 of 271 (1.8%), control 18 of 271 (6.6%), NNT 21, adjusted per study, PSM, multivariate Cox regression, primary outcome.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Morgenstern et al., 16 Apr 2021, retrospective, propensity score matching, Dominican Republic, peer-reviewed, 16 authors, dosage 200μg/kg weekly, trial NCT04832945 (history).
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