Very late stage RCT with 214 patients, mean SpO2
65%, 162 on mechanical ventilation, showing no signficant difference in mortality.
Patients not intubated at baseline show greater improvement, HR 0.43 [0.09-2.03].
Table 4 shows different results to the abstract - table 4 adjusted HR 0.80 [0.51-1.23], abstract HR 0.88 [0.51-1.53]. There was no significant difference in severe adverse events.
Hernandez-Cardenas et al., 2/5/2021, Randomized Controlled Trial, Mexico, North America, preprint, 6 authors.
risk of death, 12.0% lower, RR 0.88, p = 0.66, treatment 106, control 108.
risk of death, 57.0% lower, RR 0.43, p = 0.29, subgroup not intubated at baseline.
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.