Why it matters in the Letby case
Statistical critique of the Letby investigation argues multiple-comparisons effects were not adequately controlled in the public presentation of patterns.
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
When many comparisons are run, the probability that at least one comparison appears significant by chance grows quickly. Hospital cluster investigations that search for any pattern linking a suspect to events are especially exposed.
Statistical critique of the Letby investigation argues multiple-comparisons effects were not adequately controlled in the public presentation of patterns.
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