Table 1.

Description of sessions, aims and content of the SIBS intervention.

Topic	Session	Time	Aim	Content
Information and relation building	1 Child	20 min	Get to know each other. Get information about the intervention.	Games to get to know each other. Information about SIBS. Making rules.
	1 Parents	20 min	Get to know each other. Get information about the intervention.	Games/tasks to get to know each other. Information about SIBS.
The diagnosis	2 Child	60 min	That children become aware of own information need and formulate questions for parents.	Exploration of name, symptoms, cause, treatment consequences and timeline of the diagnosis using e.g. body map and drawings. Formulating a joint and individual questions for parents.
	2 Parents	60 min	That parents become aware of the value of talking about the diagnosis with siblings and get to know and practice communication techniques.	Psychoeducation (standardized film). Examples of communication for discussion (standardized films). Role play and practice communication based on joint question from sibling group. Prepare for joint session.
	3 Joint	Min 20 Max 60	That children and parents talk about the diagnosis and parents practice techniques with supervision.	Siblings pose individual questions as starting point for conversation. Parents practice techniques. Group leader provides supervision.
Emotional experiences	4 Child	60 min	That children become aware of their emotional/supportive needs and formulate a wish for parents.	Introducing emotions using e.g. emotion cards, mime game. Explore sibling related experiences. Formulate a joint and individual statements of “what I wish were different” for parents.
	4 Parents	60 min	That parents become aware of the value of talking with children about emotional experiences as siblings and get to know and practice communication techniques.	Psychoeducation (standardized film). Examples of communication for discussion (standardized films). Role play and practice communication based on joint statement of “wish” delivered from sibling group. Prepare for joint session.
	5 Joint	Min 20 Max 60	That children and parents talk about emotional experiences and parents practice techniques with supervision.	Siblings express their individual “wish” as starting point for conversation. Parents practice techniques. Group leader provides supervision. Parent and sibling discuss solutions related to the “wish”. Parents and sibling sign agreement about communication at home.