Best–worst scaling survey attributes and levels
| Attribute | Description | Attribute levels |
|---|---|---|
| Graft survival, years | The length of time that the transplanted organ could last | 1, 5, 10, 20, 30 |
| Serious adverse outcomes, % | ||
| Length of life | Chance of dying before the graft fails | 0, 25, 50, 75, 100 |
| Cancer | Chance of cancer other than skin cancer | 0, 10, 20, 30, 50 |
| Cardiovascular disease | Chance of serious heart disease | 0, 10, 20, 30, 50 |
| Diabetes | Chance of diabetes after transplant | 0, 10, 20, 30, 50 |
| Infection | Chance of serious infection | 0, 10, 20, 30, 50 |
| Potentially debilitating side effects, % | ||
| Weight gain | Chance of excessive weight gain | 0, 25, 50, 75, 100 |
| Cosmetic side effects | Chance of side effects that will change appearance | 0, 25, 50, 75, 100 |
| Gastrointestinal side effects | Chance of severe diarrhoea or nausea | 0, 25, 50, 75, 100 |