Two results were collected years apart with unknown method changes. What should be clarified?
| Field | Scope |
|---|---|
| Subject | Comparing laboratory methods across years |
| Exercise | Discuss the stated question; distinguish sources, interpretations and unresolved points. |
Ask whether assay, instrument, units or reference intervals changed and retain both original reports. Do not infer a physiological trend before assessing measurement comparability with a clinician.
Clarification for “Comparing laboratory methods across years”: the point beginning “Ask whether assay, instrument, units or reference intervals changed…” belongs to the question as written. It should not be read as a report that a new check, purchase or experiment has been completed. Review focus: scope. Keep the stated question separate from any broader claim.
Method note for “Comparing laboratory methods across years”: use “Ask whether assay, instrument, units or reference intervals changed…” as a row heading in a proposed working record. Put the statement, its supporting source or measurement, and any unresolved detail in separate fields. This proposes a format; it supplies no additional evidence. Keep the stated question separate from any broader claim.
Limit of the answer in “Comparing laboratory methods across years”: “Ask whether assay, instrument, units or reference intervals changed…” is an excerpt from the discussion, not an independent verification. A reader needs the relevant original material before treating an interpretation as established. Review focus: scope. Keep the stated question separate from any broader claim.