The choice of time scales in survival analysis has implications: calendar time versus patients' time-to-event.
Vilsmeier J; Büchele G; Rehm M; Unseld T; Rothenbacher D; Beyersmann J · 2026 · BMC medical research methodology
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Background In the EvaCoM project, a retrospective cohort study of Germany-wide health insurance data of 29607 geriatric patients with fractures, the use of different time scales led to contradicting estimates in the Cox proportional…
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Metadata source: Europe PMC · DOI 10.1186/s12874-026-02884-3