Epidemiology: Incidence and Prevalence · USMLE Step 1

Which scenario best illustrates incidence?

  1. The total number of diabetes cases in 2025
  2. The number of new diabetes cases in 2025
  3. The proportion of adults living with diabetes
  4. The number of diabetes-related deaths in 2025
Show answer and explanation

Correct answer: The number of new diabetes cases in 2025

Incidence focuses on new cases arising in a defined period. It measures the risk of developing the disease.

Difficulty: Medium Question 15 of 20

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