Question

The preferred public health approach to control non-communicable diseases is:

• A. Shift the population curve of risk factors by a population based approach
• B. Focus on high risk individuals for reduction of risk
• C. Early diagnosis and treatment of identified cases
• D. Individual disease based vertical programmes

Hint:

Most disease comes from the large moderate risk group, so shifting the whole population's risk factors prevents more disease than treating only high risk individuals.

Answer 1

The Correct Option is A

Step 1: Understanding the Question.
The question asks which strategy public health experts prefer for controlling non-communicable diseases such as hypertension, diabetes, and heart disease at the population level.

Step 2: Key Concept or Approach.
Geoffrey Rose described two ways to reduce disease in a population, the high risk approach and the population approach. The high risk approach finds people with the highest risk and treats them individually. The population approach instead tries to shift the risk factor distribution of the whole community a little, for example lowering the average salt intake or average blood pressure of everyone, not just the few with the highest readings.

Step 3: Detailed Explanation.
Most cases of a non-communicable disease actually come from the large number of people at moderate risk, not from the small number at very high risk, since the moderate risk group is so much bigger. So a small shift in risk factors across the whole population prevents more total disease than treating only the few high risk individuals. This is why the population based approach, shifting the whole risk curve, is preferred for non-communicable disease control. The high risk approach in option 2 is useful and complements the population strategy, but it treats only a narrow slice of people and misses most future cases. Early diagnosis and treatment in option 3 is a form of secondary prevention, it manages disease after it starts rather than preventing it in the first place. Vertical, disease specific programmes in option 4 work against a single disease with little coordination, and for non-communicable diseases, which share common risk factors like tobacco, poor diet and inactivity, an integrated population wide approach works better than separate vertical programmes.

Step 4: Final Answer.
The preferred public health strategy for non-communicable disease control is the population based approach that shifts the whole risk factor curve.