Table 1.

Overview of the categories and subthemes.

Category	Subtheme
1 Importance of understanding the origins of mental illness for SDM
2 Relevance of getting a psychiatric diagnosis on SDM
3 Importance of stigma on informedness about mental illness and SDM	3.1 Stigmatization
	3.2 Destigmatization
4 Experiencing (shared) decision making	4.1 Past experiences
	4.2 Ideas for improving the decision-making process
5 Enabling and hindering structures to implement treatment decisions	5.1 Good experiences
	5.2 Criticism
	5.3 Ideas for improving
6 Specific needs of individuals affected by mental illness and family members concerning SDM	6.1 Specific needs of affected persons
	6.2 Specific needs of family members