Table 3.

Prevalence of different levels of methylphenidate overuse (defined as having filled prescriptions during 1 year representing 121%–150%, 151%–200%, and >200% drug coverage) among individuals aged 6–79 years residing in Sweden

Percentage of time covered with methylphenidate	<100%		101%–120%		121%–150%		151%–200%		>200%
	n	%	n	%	n	%	n	%	n	%
Total	45,439	79.83	3,573	6.28	3,606	6.33	2,377	4.18	1,927	3.39
Age (years)
6–12	11,055	92.13	515	4.29	309	2.58	95	0.79	25	0.21
13–18	14,594	82.98	1,204	6.85	1,138	6.47	508	2.89	144	0.82
19–29	9,733	79.89	755	6.20	779	6.39	552	4.53	364	2.99
30–45	6,918	66.84	766	7.40	940	9.08	835	8.07	891	8.61
46–65	3,002	64,88	322	6.96	430	9.29	378	8.17	495	10.70
66–79	137	78,29	11	6.29	10	5.71	9	5.14	8	4.57
Sex
Women	16,650	80.52	1,304	6.31	1,246	6.03	860	4.16	619	2.99
Men	28,789	79.43	2,269	6.26	2,360	6.51	1,517	4.19	1,308	3.61
Household income
Higher	19,865	80.20	1,524	6.15	1,571	6.34	999	4.03	811	3.27
Lower	25,574	79.54	2,049	6.37	2,035	6.33	1,378	4.29	1,116	3.47
ADHD diagnosis
No	10,795	85.15	666	5.25	637	5.02	340	2.68	240	1.89
Yes	34,644	78.30	2,907	6.57	2,969	6.71	2,037	4.60	1,687	3.81
Health care visit
No	8,860	83.48	597	5.63	624	5.88	321	3.02	211	1.99
Yes	36,579	78.99	2,976	6.43	2,982	6.44	2,056	4.44	1,716	3.71
Previous ADHD medication use
No	23,923	80.74	1,238	4.54	989	3.62	680	2.49	463	1.70
Yes	21,516	78.83	2,335	7.88	2,617	8.83	1,697	5.73	1,464	4.94
Previous diagnosis of alcohol and drug misuse
No	40,267	82.38	2,989	6.11	2,933	6.00	1,675	3.43	1,018	2.08
Yes	5,172	64.33	584	7.26	673	8.37	702	8.73	909	11.31

Abbreviation: ADHD, attention deficit hyperactive disorder.