Table IDisease-6. Notified cases of hepatitis B infection among injecting drug users: number of IDUs and percentage of IDUs amongst all cases with known risk factor. Part (i) Notifications of IDUs with hepatitis B


Country	Region	Ref.		1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002
Bulgaria	Sofia	¹	cases IDU				16	29	29	33	27	38	36	47
			% IDU
Czech Republic	NATIONAL	¹	cases IDU					39	46	107	150	168	134	118
			% IDU
Denmark	NATIONAL	⁴	cases IDU	9	36	49	39	36	30	25	13	20	11	11
			% IDU	17	34	43	35	36	30	27	22	32	23	18
Estonia	NATIONAL	¹	cases IDU											106
			% IDU											70.6
Latvia	NATIONAL	³	cases IDU										344	96
			% IDU										47	19.5
Luxembourg	NATIONAL	¹	cases IDU				81	50	81	58	63	32	82
			% IDU
Hungary	NATIONAL	¹	cases IDU			3		1		3	10		6	6
			% IDU					1.5		4.2
Netherlands	NATIONAL	¹⁹	cases IDU			15	24	10	8	7	2	3	3
			% IDU			13.8	22.4	11.1	7.7	5.4	2.3	3.2	3.3
Poland	POMORSKIE Gdansk	³	cases IDU											86
			% IDU
Slovenia	NATIONAL	¹	cases IDU						0	0	1	1	0	0
			% IDU								25	9
Slovakia	BRATISLAVA REGION	^{1, 4}	cases IDU						8	6	5	7	2
			% IDU
Finland	NATIONAL	^1a	cases IDU							76	106	82	28	43
			% IDU							62	74	67	40	52
Sweden	NATIONAL	³	cases IDU	64	86	144	151	89	61	48	90	110	119	166
			% IDU	42.4	47.0	62.9	60.9	57.8	46.2	40.0	44.9	57.9	62	65
UK	ENGLAND AND WALES	^{23, 26}	cases IDU	63	108	102	147	166	192	251	234	201	97	152
			% IDU	21	25	27	40	44	49	48	51	47	38	42.1
	SCOTLAND	²⁷	cases IDU			17	14	19	24	58	115	89	69	37
			% IDU
	NORTHERN IRELAND	²⁵	cases IDU			2	1	1	0	1	1	1	0	0
			% IDU
Norway	NATIONAL	⁷	cases IDU	2	10	10	39	55	132	385	375	176	135	120
			% IDU	8.7	25	38.5	47.6	64.0	78.6	83.9	82.4	70.1	71.8	71.9

Notes:
For methods and definitions see [Methods and definitions - Drug-related infectious diseases]

Definitions of notifiable HBV infections differ strongly between countries, underreporting may be large and about 30 % of acute infections are asymptomatic. Therefore numbers should not be interpreted as an estimate of real incidence and they cannot be directly compared. Trends over time and the percent IDUs among all notified cases may be more comparable between countries, although these may also be affected by differences in testing patterns between countries and over time. Data for most recent year(s) may be incomplete due to reporting delay.
The figures in the table should be interpreted in conjunction with the relevant notes and on the studies, given in [Table IDisease-6 Part (ii) Notes and comments]

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