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HCQ study #34 of 320   Meta Analysis
5/11 Late treatment study
Rosenberg et al., JAMA, May 11, 2020, doi:10.1001/jama.2020.8630 (Peer Reviewed)
Association of Treatment With Hydroxychloroquine or Azithromycin With In-Hospital Mortality in Patients With COVID-19 in New York State
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Restrospective observational late stage study showing no significant differences but calling for clinical trials.
Zervos et al. [1] point out serious limitations that they say should be corrected on the record: patients receiving HCQ with or without AZ were overall sicker on presentation and had multiple other risk factors including much higher risk based on ethnicity; patients receiving HCQ were more likely to be obese, diabetic, have chronic lung disease, and cardiovascular conditions; yet these sicker patients had approximately the same mortality rates compared to patients with a milder course of the disease and less risk factors. However, the authors conclude that "there are no significant benefits." It is noteworthy that HCQ was associated with a significant survival benefit in a larger cohort of patients from New York City as reported by Mikami et al [2].
See also [3].

Rosenberg et al., 5/11/2020, retrospective, USA, North America, peer-reviewed, 14 authors.
risk of death, 35.0% higher, RR 1.35, p = 0.31, treatment 189 of 735 (25.7%), control 28 of 221 (12.7%), adjusted per study.
risk of death, 8.0% higher, RR 1.08, p = 0.79, treatment 54 of 271 (19.9%), control 28 of 221 (12.7%), adjusted per study.

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.
All 320 studies   Meta Analysis
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