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Ask whether assay, instrument, units or reference intervals changed and retain both original reports. Do not infer a physiological trend before assess...

Case 45 — Exploratory subgroup analysis: keep the label visible · source wording exercise A subgroup finding was not the primary planned analysis. How...

Method note for “Comparing laboratory methods across years”: use “Ask whether assay, instrument, units or reference intervals changed…” as a row headi...

Clarification for “Exploratory subgroup analysis: keep the label visible”: the point beginning “State whether it was prespecified and how…” belongs to...

Case 14 — Exploratory subgroup analysis: keep the label visible Limit of the answer in “Exploratory subgroup analysis: keep the label visible”: “State...

Case 5 — Reference management: distinguish primary and secondary sources Limit of the answer in “Reference management: distinguish primary and seconda...