Table A7.

Cluster compositions of original ideas and mean importance ratings of parents in group 1 (S1 N = 4; S2 N = 7), including the assignment of original ideas to main ideas.

Clusters	Original Ideas	Idea nr. 1	Merged to Main Idea 2	Mean 3
1. Energy, diet, and physical activity				3.3
	Being home all day and therefore not being tired	1	Inadequate daytime stimulation	3.6
	Being too tired when going to bed	2	Too tired	3.3
	Not having played outside at daytime	5	Inadequate time outside at daytime	3.0
	Feeling hungry during the night	10	Inadequate amount of food	2.6
	Eating too much candy and/or drinks with a lot of sugar	11	Unhealthy diet	3.4
	Eating too much before bedtime	12	Excessive amount of food close to bedtime	3.3
	Having too much energy from his/herself	20	Too energetic	3.9
2. Stressful and exciting thoughts and feelings, physical well-being, routines and screen time behaviour				3.4
	A stressful event coming up for the child the next day	3	Upcoming stressful event	4.0
	Exciting activities planned the next day	4	Excitement	3.6
	Long nights during the days with more hours of darkness	6	Seasonal changes	2.9
	The transition from long days to short days or the other way around	7	Seasonal changes	3.0
	Not willing to go to sleep	13	Reluctant to go to sleep	3.0
	Playing with the tablet or phone before bedtime	14	Screen use before bedtime	3.4
	Being not allowed to play with their phone before bedtime, when the child normally always does this	15	Deviate from bedtime routine	2.6
	In bed thinking about what happened that day, when a child did not talk about their day	26	Worrying	3.6
	Being ill	28	Illness	4.1
	Sleep walking	29	Sleep walking	3.0
	No consistent sleep times / sleep schedule	30	No consistent sleep schedule	3.9
	Having watched a scary movie	32	Watching something scary	3.4
3. Stressful family or school situation				3.7
	A stressful family situation due to a fight between parents	19	Parental relationship problems	3.4
	Parental feeling of anger or stress which is transferred to the child	24	Parental stress	3.9
	Having had a fight at school and still and still worrying about that	25	Recent stressful event	3.9
	Feeling insecure about his/herself	27	Insecurity about themselves	4.0
	Being bullied at school	31	Being bullied	3.4
4. Sleep environment
	A bedroom with too much light	8	Too much light	2.7
	A bedroom that is too dark	9	Too dark	2.9
	Having to sleep alone, while the child actually wants to sleep with his/her parents	16	Reluctant to sleep alone	3.3
	Being distracted due to toys in the bedroom	17	Distractions in the bedroom	2.4
	Sleeping in one room with a brother/sister who keeps the child awake	18	Distractions in the bedroom	2.7
	A less tidy or clean house than usual	21	Distractions in the bedroom	3.0
	A less tidy and messy bedroom	22	Distractions in the bedroom	2.9
	A bedroom which is too hot or too cold	23	Not the right temperature	3.1

¹ Idea nr. = The number of the generated idea in this group. This corresponds with the numbers on the concept maps in Appendix A. ² Merged into main idea = The overall main idea to which the original idea of this group is assigned. ³ Mean = mean importance rating on a 5-point Likert scale based on the question: ‘Think about the sleep of a child in the age of 4-12 years, how much does this affect their sleep?’ answered on a 5-point Likert scale from ‘does not affect at all = 1’ to ‘affects a whole lot = 5’. Bold values indicate ideas rated as important (with a rating ≥3.00); Cursive values indicate the overall mean rating per cluster. S1 = Session 1, brainstorm; S2 = Session 2, sort and rate.