Practice question Researchers compared the risk of four cardiovascular diseases in smokers with the risk in people who had never smoked.
Increase in risk compared with people who had never smoked | Disease | Increase in risk |
|---|
| W | 12% |
|---|
| X | 24% |
|---|
| Y | 37% |
|---|
| Z | 65% |
|---|
Give two conclusions supported by these data.