Articles repérés par Hervé Le Crosnier

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  • A mysterious company’s coronavirus papers in top medical journals may be unraveling | Science | AAAS
    https://www.sciencemag.org/news/2020/06/mysterious-company-s-coronavirus-papers-top-medical-journals-may-be-unra

    On its face, it was a major finding: Antimalarial drugs touted by the White House as possible COVID-19 treatments looked to be not just ineffective, but downright deadly. A study published on 22 May in The Lancet used hospital records procured by a little-known data analytics company called Surgisphere to conclude that coronavirus patients taking chloroquine or hydroxychloroquine were more likely to show an irregular heart rhythm—a known side effect thought to be rare—and were more likely to die in the hospital.

    Within days, some large randomized trials of the drugs—the type that might prove or disprove the retrospective study’s analysis—screeched to a halt. Solidarity, the World Health Organization’s (WHO’s) megatrial of potential COVID-19 treatments, paused recruitment into its hydroxychloroquine arm, for example.

    But just as quickly, the Lancet results have begun to unravel—and Surgisphere, which provided patient data for two other high-profile COVID-19 papers, has come under withering online scrutiny from researchers and amateur sleuths. They have pointed out many red flags in the Lancet paper, including the astonishing number of patients involved and details about their demographics and prescribed dosing that seem implausible. “It began to stretch and stretch and stretch credulity,” says Nicholas White, a malaria researcher at Mahidol University in Bangkok.

    Today, The Lancet issued an Expression of Concern (EOC) saying “important scientific questions have been raised about data” in the paper and noting that “an independent audit of the provenance and validity of the data has been commissioned by the authors not affiliated with Surgisphere and is ongoing, with results expected very shortly.”

    Hours earlier, The New England Journal of Medicine (NEJM) issued its own EOC about a second study using Surgisphere data, published on 1 May. The paper reported that taking certain blood pressure drugs including angiotensin-converting enzyme (ACE) inhibitors didn’t appear to increase the risk of death among COVID-19 patients, as some researchers had suggested. (Several studies analyzing other groups of COVID-19 patients support the NEJM results.) “Recently, substantive concerns have been raised about the quality of the information in that database,” an NEJM statement noted. “We have asked the authors to provide evidence that the data are reliable.”

    Surgisphere’s sparse online presence—the website doesn’t list any of its partner hospitals by name or identify its scientific advisory board, for example—have prompted intense skepticism. Physician and entrepreneur James Todaro of the investment fund Blocktown Capital wondered in a blog post why Surgisphere’s enormous database doesn’t appear to have been used in peer-reviewed research studies until May. Another post, from data scientist Peter Ellis of the management consulting firm Nous Group, questioned how LinkedIn could list only five Surgisphere employees—all but Desai apparently lacking a scientific or medical background—if the company really provides software to hundreds of hospitals to coordinate the collection of sensitive data from electronic health records. (This morning, the number of employees on LinkedIn had dropped to three.) And Chaccour wonders how such a tiny company was able to reach data-sharing agreements with hundreds of hospitals around the world that use many different languages and data recording systems, while adhering to the rules of 46 different countries on research ethics and data protection.

    The controversy has been an unfortunate distraction, Hernán adds. “If you do something as inflammatory as this without a solid foundation, you are going to make a lot of people waste time trying to understand what is going on.”

    Chaccour says both NEJM and The Lancet should have scrutinized the provenance of Surgisphere’s data more closely before publishing the studies. “Here we are in the middle of a pandemic with hundreds of thousands of deaths, and the two most prestigious medical journals have failed us,” he says.

    #Chloroquine #Revues_médicales #Surgisphere #Données_médicales #Fake_science