Discrete choice experiment design: product attributes and levels
| Attribute | Levels tested |
| Within subjects | |
| Cigarette brand | Marlboro |
| Pall Mall | |
| Camel | |
| Basic | |
| Tar level | High |
| Low | |
| Disease outcome | Cancer |
| Cardiovascular disease | |
| Lung disease | |
| Pregnancy-related adverse outcomes | |
| Disease link | No link (disease statement only) |
| Constituent linked to disease | |
| Between subjects | |
| Listing of constituents | Grouped by outcome |
| Listed in alphabetical order | |
| Numeric information | Constituent without numeric yield |
| Numeric yield listed with constituent | |