Table 1. The percentage of children and adolescents (≤ 18 years old) with HKD in 2000 and 2007, grouped by sex and age.

		Prevalence of treatment for HKD (%)
Sex	Age (years)	2000		2007		Relative change from 2000 to 2007 (%)
		Percentage (%)	95% confidence interval	Percentage (%)	95% confidence interval
Male	<5	0.95	0.77–1.25	0.66	0.50–0.98	– 31
	5 to 9	4.38	3.99–4.85	4.48	4.04–5.04	+ 2
	10 to 14	2.67	2.39–3.03	5.22	4.77–5.77	+ 96
	15 to 18	0.48	0.36–0.70	2.18	1.88–2.60	+ 354
	All ages	2.31	2.16–2.49	3.39	3.18–3.63	+ 47
Female	<5	0.51	0.39–0.75	0.19	0.13–0.42	– 63
	5 to 9	1.3	1.10–1.60	1.54	1.29–1.90	+ 18
	10 to 14	0.57	0.46–0.77	1.35	1.13–1.68	+ 137
	15 to 18	0.21	0.15–0.40	0.56	0.43–0.81	+ 167
	All ages	0.68	0.60–0.79	0.97	0.86–1.11	+ 43
Both sexes	<5	0.73	0.61–0.91	0.43	0.33–0.61	– 41
	5 to 9	2.88	2.65–3.16	3.04	2.77–3.36	+ 6
	10 to 14	1.66	1.49–1.86	3.35	3.09–3.67	+ 102
	15 to 18	0.35	0.27–0.48	1.39	1.22–1.62	+ 297
	All ages	1.52	1.43–1.62	2.21	2.09–2.34	+ 45

HKD, hyperkinetic disorders; ICD-10 diagnosis F90, without the supplementary designation "suspected" or "excluded"