Table 1.
List of attributes and attribute levels used in constructing the discrete choice experiment
| Attribute | Attribute Level |
|---|---|
| Chance that the condition will develop | 90% |
| 75% | |
| 50% | |
| 10% | |
|
| |
| Age of onset | Less than 1 year old |
| 1 to 5 years old | |
| 6 to 12 years old | |
| 13 to 18 years old | |
|
| |
| Speed that the condition may get worse | Rapid |
| Moderate | |
| Slow | |
| Stable | |
|
| |
| Options to improve quality of life | Limited options available |
| Effective options available | |
|
| |
| Level of mental disability | Severe |
| Mild to moderate | |
| None | |
|
| |
| Level of physical disability | Severe |
| Mild to moderate | |
| None | |
|
| |
| Shortened | |
| Normal | |