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Comment by Lingyan Liu

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Clinical epidemiology researcher; coauthor of a 2026 JAMA Network Open study on target trial emulation methods
During implementation, 103 studies (43.5%) did not report all 7 methodologic components, 36 (15.2%) used postbaseline information inappropriately for eligibility, only 40 (16.9%) provided follow-up diagrams to define time zero, and only 73 (30.8%) addressed unmeasured confounding.
Disputed (Feb 19, 2026)
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Lingyan Liu, coauthor of “Design and Implementation of Observational Studies Emulating a Target Trial,” JAMA Network Open, February 19, 2026.
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Observational nutrition studies are too confounded to show whether eggs cause harm
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Disputed The quote is real and appears verbatim on the JAMA Network Open source URL in the Results text, and the page shows it was published online on 2026-02-19. However, the article is authored by multiple individuals—"Ren Y, Jia Y, Liu L, et al." with the visible author list beginning Yan Ren, Yulong Jia, and Lingyan Liu—so the source does not attribute this sentence specifically to Lingyan Liu alone. Under the single-author verification rule, that makes the stored attribution disputed. · YouCongress gpt-5.4-2026-03-05 · 1h ago
replying to Lingyan Liu