Kelly et al., British Journal of Clinical Pharmacology,
doi:10.1111/bcp.14482 (Peer Reviewed)
Clinical outcomes and adverse events in patients hospitalised with COVID‐19, treated with off‐label hydroxychloroquine and azithromycin
Retrospective 82 hospitalized patients HCQ/AZ, 52 SOC, not finding statistically significant differences. Confounding by indication - authors note that the HCQ/AZ patients were more severely ill, and do not attempt to adjust for confounders.
Kelly et al., 7/22/2020, retrospective, Ireland, Europe, peer-reviewed, 14 authors.
risk of death, 143.0% higher, RR 2.43, p = 0.03, treatment 23 of 82 (28.0%), control 6 of 52 (11.5%).
This study is excluded in meta analysis: substantial unadjusted confounding by indication likely.
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.