Why it matters in the Letby case
Statistical critique argues the Letby shift chart was constructed under selection bias, undermining its inferential weight even where the underlying presence data is correct.
May 2026: Thirlwall Inquiry report delayed to at least September 2026 · six-baby inquests relisted to 2027 · CCRC review active · Shoo Lee Panel: no medical evidence of deliberate harm.
Statistical explainer
Selection bias arises when the events under analysis are not chosen independently of the explanation being tested. In hospital cluster investigations it appears whenever a suspect is identified first and then a set of events is curated around their presence.
Statistical critique argues the Letby shift chart was constructed under selection bias, undermining its inferential weight even where the underlying presence data is correct.
Found an error or missing source? Send a correction with the page URL and supporting source.