Table 2.

Postal questionnaire

Constructs	Measures
Socio-demographic data	age; gender; native language; family status; partnership; education; occupation
Quality of Life	Health Survey SF-12 [20]
Clinical appointment	indication of appointment; time since appointment; subject of decision; decision made
Preference for involvement in medical decision making	Autonomy-Preference-Index (API; [21])
Experienced involvement	Shared Decision Making Questionnaire (SDM-Q-9; [22])
Decisional conflict	Decisional Conflict Scale (DCS; [23])
Patient satisfaction	Satisfaction with ambulatory care (ZAPA; [24])