Heart disease Quote by T. Colin Campbell
““A classic illustration of this difficulty is that countries with more telephone poles often have a higher incidence of heart disease, and many other diseases. Therefore, telephone poles and heart disease are positively correlated. But this does not prove that telephone poles cause heart disease. In effect, correlation does not equal causation.””
About This Quote
Correlation shows two variables move together but does not prove one causes the other.
In simple terms: Correlation ≠ causation
Don’t assume cause from correlation.
Themes
Mood
Type
When to use this quote
- research analysis
- policy making
- public health messaging
Key Concepts
Questions to Reflect On
- How can you test if a relationship is causal?
- What other factors might explain the link?
Correlation can be misleading without experimental evidence.