. 2020 Feb 29;17(5):1583. doi: 10.3390/ijerph17051583

Table A4.

Cluster compositions of original ideas and mean importance ratings of children in group 3B (S1 N = 7; S2 N = 8), including the assignment of original ideas to main ideas.

Clusters	Original Ideas	Idea nr. ¹	Merged to Main Idea ²	Mean ³
1. Stressful and exciting thoughts and feelings				3.1
	Looking forward to something that will happen the next day	1	Excitement	3.4
	Thinking and having many thoughts	2	Many thoughts	4.3
	Being nervous for something that is going to happen	3	Upcoming stressful event	2.9
	Thinking about which secondary school I will go to	4	Upcoming stressful event	2.5
	Thinking about my parents, who were in a fight	8	Stressful family situation	2.4
	Thinking about my share in a fight at school and how I could do things better next time	9	Recent stressful event	2.5
	Being enthusiastic about something that happened that day	11	Excitement	2.9
	Thinking about not being able to sleep well	23	Upcoming stressful event	2.8
	Thinking about the divorce of my parents	24	Stressful family situation	2.0
	Being bullied and thinking about this when I am in bed	28	Recent stressful event	2.5
	When something stressful is going to happen	29	Upcoming stressful event	3.6
2. Noise and distractions in the bedroom				2.3
	When someone in our home is watching TV and the sound is too loud	13	Noise inside	2.4
	Noise from a brother or sister with whom I share the same room	20	Distractions in the bedroom	1.9
	Noise from the street	31	Noise outside	2.4
	Noise inside our house	32	Noise inside	2.5
	When my phone beeps at night due to games or messages	42	Distractions in the bedroom	1.5
	The buzzing and stinging of mosquitos	45	Distractions in the bedroom	3.3
	Not feeling comfortable because of people screaming outside	46	Feeling unsafe	2.3
	Ticking of the clock in my bedroom	48	Distractions in the bedroom	2.1
3. Illness and discomfort	Illness and not feeling well	7	Illness	3.5
	Not being able to lie down comfortably in my bed	10	Unable to lie down comfortably	2.4
	Having had too much to eat	14	Inadequate dietary behaviour	2.3
	Urgently needing to pee	22	Needing to pee	2.6
	Feeling too cold in bed	25	Not the right temperature	2.9
	Feeling too hot in bed	26	Not the right temperature	2.6
	Feeling pain	39	Pain	2.5
	Being thirsty	41	Inadequate dietary behaviour	2.3
4. Emotions				2.6
	Nightmares	30	Nightmares	2.8
	Being afraid	36	Being afraid	2.6
	Being very happy	37	Excitement	2.9
	Being angry	38	Negative affective state	2.4
	Being afraid that someone comes into my home	44	Being afraid	2.1
5. Unable or reluctant to sleep				2.2
	Having had too little exercise during the day and therefore too much energy in the evening	5	Inadequate amount of daytime physical activity	2.5
	When my pet comes into my bedroom and distracts me when I am in bed	6	Distractions in the bedroom	1.5
	Watching a scary movie and continuing to think about it ⁴	12	Watching/reading something scary	2.6
	Having had too little too eat and feeling hungry ⁴	15	Inadequate dietary behaviour	2.6
	Being too tired because I did a lot	17	Excessive daytime stimulation	1.9
	Not feeling like going to sleep ⁴	18	Reluctant to go to sleep	2.4
	Going to bed too early and not being tired	19	Going to bed too early	3.6
	Going to bed too late and not feeling sleepy any more	21	No consistent sleep schedule	2.3
	Watching TV right before going to sleep	33	Screen use around bedtime	2.0
	Playing computer games right before going to sleep	34	Playing active games before bedtime	2.0
	Using a screen with blue light (TV, computer, laptop, tablet) right before going to sleep	35	Screen use around bedtime	2.3
	Being really tired and getting activated when I brush my teeth	40	No consistent sleep schedule	1.8
	Scary sounds ⁴	43	Scary sounds	2.4
	Too much light in my bedroom	47	Too light	2.4
	Lying in my mother’s bed and looking out the window ⁴	49	Distractions in the bedroom	1.5
6. General negative state of mind				2.5
	When I feel gloomy and not in the mood to do anything	16	Negative affective state	2.6
	Feeling insecure about myself	27	Negative affective state	2.4

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 your sleep, how much does this affect your sleep?’ answered on a 5-point Likert scale from ‘does not affect at all = 1’ to ‘affects a whole lot’ = 5’; ⁴ idea was moved to cluster 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.