Table 2 Attribute and levels included in the DCE questionnaire

Untreated responders ^&:

5%, 20%, 35%, 50%

Proportion of patients who could be cured by the new medication (responders) but will not receive it as a result of inaccurate genetic test result.

Unnecessary treatment of non-responders ^†:

5%, 20%, 35%, 50%

Proportion of patients who would not benefit from the new medication (non-responders) but will receive it as a result of wrong genetic test result.

Severity of side effects:

Severe, Moderate, Mild

The new medication may be associated with side effects such as nausea, hair loss, skin rash and fatigue. The potential levels of Side Effect Severity were:

Likelihood of side effects:

5%, 50%, 95%

The side effects described in Attribute 3 will not necessarily occur for all individuals. Instead, they will occur with a particular percentage chance. Possible levels were:

Genetic test turnaround time:

2 days, 7 days, 12 days

The time required to obtain the genetic test results, after the test has been performed.

Genetic test procedure:

Mouth swab, Blood sample, Tumor biopsy, Bone marrow biopsy, Liver biopsy

Type of the procedure that is needed for doing the genetic test.

Genetic test cost:

$50, $500, $1000, $1500

Please assume that you would be paying only for the genetic test out-of-pocket.