Table 1.

Factors and levels included in the study

	Factors	Levels
1	Reason for the consultation	• Prevention • Mild disease • Severe disease
2	Time of negative consequences	• Immediate negative • Negative in the future
3	Time until treatment should be started	• Treatment should be started immediately • For the beginning of treatment there is no time pressure
4	Number of therapeutic options	• One therapeutic option • More than one therapeutic option
5	Adverse effects of the treatment	• Treatment(s) is (are) well tolerated • Treatment(s) could have severe adverse effects • Treatments are partly well tolerated, may partly have severe adverse effects
6	Scientific evidence for the effectiveness of the treatment	• Good evidence for effect • No evidence for Effect • Good evidence for one/some treatment option/s, no evidence for other treatment option/s
7	Wish of the patient to participate	• The patient wishes to participate • The patient does not wish to participate