A study followed two comparable groups of 1000 adults for six years. One group received support to choose foods lower in saturated fat. The other group continued with their usual diet.
| Group | Mean daily saturated fat intake in g | Number of people who had a heart attack |
|---|---|---|
| dietary support | 16 | 24 |
| usual diet | 29 | 41 |
Explain how the difference in saturated fat intake could have caused the difference in the number of heart attacks.
102 exam-style questions on Edexcel GCSE Biology 5.4 Non-communicable diseases, covering 5.4.1 Interaction of factors in non-communicable disease, 5.4.2 Lifestyle factors and non-communicable disease, and 5.4.3 Treatments for cardiovascular disease. Each one has a worked solution and a mark scheme showing where the marks go.