Small study of 24 consecutive patients in serious condition (9 days post symptoms, mean SpO
2 87.4) using combined treatment with ivermectin, doxycycline, zinc, vitamin D, and vitamin C, showing no mortality or hospitalization with treatment. Two patients declined treatment and both died. This study uses a synthetic control arm.
Hazan et al., 7/7/2021, retrospective, USA, North America, preprint, 7 authors, dosage 12mg days 1, 4, 8, this trial uses multiple treatments in the treatment arm (combined with doxycycline, zinc, vitamin D, vitamin C) - results of individual treatments may vary.
risk of death, 85.9% lower, RR 0.14, p = 0.04, continuity correction due to zero event (with reciprocal of the contrasting arm).
risk of hospitalization, 93.3% lower, RR 0.07, p = 0.001, continuity correction due to zero event (with reciprocal of the contrasting arm).
This study is excluded in meta analysis: study uses a synthetic control arm.
Effect extraction follows
pre-specified rules
prioritizing more serious outcomes. For an individual study the most serious
outcome may have a smaller number of events and lower statistical signficance,
however this provides the strongest evidence for the most serious outcomes
when combining the results of many trials.