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A device study may report favourable measurement accuracy or a biological indicator. That finding does not automatically establish every patient-benefit claim. Appraisal should explain the relationship between the observed measure and the proposed clinical benefit, including the uncertainty that remains.
Scope of the decision
Assess the purpose, scientific basis and relevant population of an intermediate measure. Technical performance can be important, but additional assumptions connecting it to a clinical outcome should remain visible. A relationship established elsewhere is not automatically valid for another device or user group.
Worked review
For example, a sensor study demonstrates lower measurement error. A report turns this into a claim of reduced hospitalisation. The reviewer examines the intervening decisions and care steps and separates what the publication actually observed. The unsupported benefit statement is appropriately narrowed or the additional evidence needed is identified.
Practical checks
- Explain whether the measured outcome has a technical, intermediate or direct clinical role.
- Keep assumptions between the intermediate measure and claimed benefit visible.
- Assess support for the connection in the relevant population and setting.
Acceptance and limits
Acceptance requires interpretation that does not create greater certainty than the observed result supports. Intermediate measures are not useless; they can contribute valuable information to an appropriate question. Patient-benefit claims should nevertheless remain proportionate to the relationship and uncertainty, with suitable clinical and methodological review.
Frequently asked questions
- Does technical accuracy establish clinical benefit?
- Not always. Intended purpose and the pathway to patient outcomes need separate assessment.
- Can intermediate measures support any claim?
- Yes, when their contribution and assumptions are explicitly justified.