Which of the following is NOT a use of risk as described?

• A. Prediction
• B. Diagnosis
• C. Cause
• D. Treatment planning

Answer: (D)

Risk estimates are used to forecast future events, understand how exposures relate to disease (causation), and guide actions by ranking individuals by their risk to inform prevention or treatment decisions. Prediction is about estimating how likely it is that someone will develop a disease or outcome. Understanding causes involves seeing how higher or lower risk is associated with specific exposures. Treatment planning uses risk to decide who should receive preventive or therapeutic interventions, tailoring care based on risk level.

Diagnosis, on the other hand, is about determining whether someone currently has a disease, based on signs, symptoms, and diagnostic tests. Risk estimates can influence diagnostic thinking (e.g., pretest probability), but risk by itself is not the means by which a current disease is diagnosed.

Therefore, the use that does not fit with how risk is described in this context is diagnosis. The other uses—prediction, causal inference, and treatment planning—are consistent with the concept of risk.