Table 3.

Child demographics by age and country

	Children (n = 332)			Adults (n = 56)
	UK	Spain	Belgium	UK	Spain	Belgium
Age (median, IQR)
	9 [5.75, 12]	7 [4, 9.5]	5 [3, 10]	37 [32, 37.5]	36 [26.5, 37]	30 [24, 35.75]
Gender
Male	92 (79.31%)	82 (73.87%)	80 (76.19%)	10 (66.67%)	19 (82.61%)	14 (77.78%)
Female	17 (14.66%)	20 (18.02%)	8 (7.62%)	3 (20%)	2 (8.7%)	2 (11.11%)
Non-binary identification	2 (1.72%)	1 (0.9%)	0	0	0	0
Did not say	5 (4.31%)	8 (7.21%)	17 (16.19%)	2 (13.33%)	2 (8.7%)	2 (11.11%)
Learning disability
Yes	68 (58.62%)	31 (27.93%)	47 (44.76%)	7 (46.67%)	8 (34.78%)	11 (61.11%)
No	41 (35.34%)	66 (59.64%)	40 (38.01%)	6 (40%)	12 (52.17%)	5 (27.78%)
Did not say	7 (6.03%)	14 (12.61%)	18 (17.14%)	2 (13.33%)	3 (13.04%)	2 (11.11%)
Reading ability
Fluent	71 (61.21%)	39 (35.14%)	56 (53.33%)	5 (33.33%)	6 (26.09%)	13 (72.22%)
Learning	24 (20.69%)	31 (27.93%)	20 (19.05%)	4 (26.67%)	6 (26.09%)	1 (5.56%)
No	18 (15.52%)	31 (27.93%)	11 (10.48%)	4 (26.67%)	8 (34.78%)	2 (11.11%)
Did not say	3 (2.59%)	10 (9.01%)	18 (17.14%)	2 (13.33%)	3 (13.04%)	2 (11.11%)
Language ability
Up to and including phrase speech	26 (22.41%)	50 (45.05%)	9 (8.57%)	7 (46.67%)	11 (47.83%)	2 (11.11%)
Including and beyond multi-part sentences	86 (74.14%)	46 (41.44%)	81 (77.14%)	6 (40%)	6 (34.78%)	14 (77.78%)
Did not say	4 (3.45%)	15 (13.51%)	15 (14.29%)	2 (13.33%)	4 (17.39%)	2 (11.11%)
Additional diagnoses
Speech and language	5 (4.31%)	4 (3.6%)	10 (9.52%)	0	1 (4.35%)	1 (5.56%)
Attention Deficit Hyperactivity Disorder	13 (11.21%)	6 (5.41%)	15 (14.29%)	1 (6.67%)	3 (13.04%)	5 (27.78%)
Mental health	5 (4.31%)	0	6 (5.71%)	0	1 (4.35%)	2 (11.11%)
Dyspraxia	8 (6.9%)	0	2 (1.9%)	0	0	0
Physical disability	3 (2.59%)	0	0	0	1 (4.35%)	0
Sensory	5 (4.31%)	0	0	0	0	0
Multiple	8 (6.9%)	0	6 (5.71%)	1 (6.67%)	0	0
Developmental delay	0	8 (7.21%)	6 (5.71%)	0	2 (8.7%)	1 (5.56%)
Did not say	69 (59.48%)	93 (83.78%)	60 (57.14%)	13 (86.67%)	15 (65.22%)	9 (50%)