Table 1

Gender and age distribution of injecting drug user samples

Country	Site	Age group	Males		Females			Both genders
Country	Site	Age group	n	%*	n	%*	%**	n	%*	Type of source
Notes: All figures have been rounded up to one decimal or to the first number ≠ 0.
NK, not known; NA, not applicable; IDU %, IDU prevalence among adult population aged 15–64.
Prevalence of age/gender group (n = sample’s gender/age distribution); Female prevalence in each sample; **Sites’ codes: Central-A (92), Central-A (402), Central-A (418), Northwest-A (416), Northwest-B (120), etc.
†Source: Breakdowns provided by the “European Centre for the Epidemiological Monitoring of AIDS” from reported HIV cases by transmission route (HIV/AIDS Surveillance in Europe. End-year report 2004. 2005, No 69)
‡Source: Panda S, Saha U, Pahari S, et al. Drug use among the urban poor in Kolkata: Behaviour and environment correlates of low HIV infection. Natl Med J India 2002;15:128–34.
§Source: Pisani E, Dadun, Sucahya PK, et al. Sexual behavior among injection drug users in 3 indonesian cities carries a high potential for HIV spread to non-injectors. JAIDS 2003;34:403–6.
¶Source: Rahbar AR, Khoshonood K, Rooholamini S. Prevalence of HIV infection and other bloodborne infections in incarcerated and non-incarcerated injection drug user (IDUs) in Mashhad, Iran. Int J Drug Policy 2004;15:151–5.
Eastern Europe & Central Asia
Azerbaijan	National	<20–24	2	0.9	1	25.0	n = 4 (1.7)	3	1.3	HIV+ DUs†
		25–29	5	2.2	0	0.0		NA	NA
		20–29	60	26.0	3	75.0		63	26.8
		30–39	130	56.3	0	0.0		NA	NA
		⩾40	34	14.8	0	0.0		NA	NA
		All	231	100.0	4	100.0		235	100.0
Belarus	National	<20–24	934	31.4	358	41.8	n = 855 (22.3)	1292	33.7	HIV+ DUs†
		25–29	477	16.0	110	12.9		587	15.3
		20–29	1067	35.9	293	34.3		1360	35.5
		30–39	448	15.1	87	10.2		535	14.0
		⩾40	48	1.6	7	0.8		55	1.4
		All	2974	100.0	855	100.0		3829	100.0
Bulgaria	National	⩽20–29	3	60.0	6	100.0	n = 6 (54.5)	9	81.8	HIV+ DUs†
		30–39	1	20.0	0	0.0		NA	NA
		⩾40	1	20.0	0	0.0		NA	NA
		All	5	100.0	6	100.0		11	100.0
Croatia	National	⩽20–24	23	7.7	0	0.0	n = 6 (1.9)	NA	NA	HIV+ DUs†
		25–29	81	26.8	0	0.0		81	26.3
		30–39	142	47.0	5	83.3		147	47.7
		⩾40	56	18.5	1	16.7		57	18.5
		All	302	100.0	6	100.0		308	100.0
Czech Rep	National	⩽20–24	11	40.7	4	80.0	n = 5 (15.6)	15	46.9	HIV+ DUs†
		25–29	7	25.9	1	20.0		8	25.0
		30–39	6	22.2	0	0.0		NA	NA
		40–49	3	11.1	0	0.0		NA	NA
		All	27	100.0	5	100.0		32	100.0
Estonia	National	⩽20–29	1736	95.3	581	96.8	n = 600 (24.8)	2317	95.7	HIV+ DUs†
		30–39	77	4.2	18	3.0		95	3.9
		40–49	8	0.4	1	0.2		9	0.4
		All	1821	100.0	600	100.0		2421	100.0
Georgia	National	⩽20–24	23	7.7	0	0.0	n = 4 (1.3)	NA	NA	HIV+ DUs†
		25–29	81	26.8	0	0.0		NA	NA
		30–39	142	47.0	4	100.0		146	47.7
		⩾40	56	18.5	0	0.0		NA	NA
		All	302	100.0	4	100.0		306	100.0
Hungary	National	⩽20–24	1	11.1	2	66.7	n = 3 (25.0)	3	25.0	HIV+ DUs†
		25–29	1	11.1	0	0.0		NA	NA
		30–39	4	44.4	1	33.3		5	41.7
		⩾40	3	33.3	0	0.0		NA	NA
		All	9	100.0	3	100.0		12	100.0
Kazakhstan	National	⩽20–29	225	53.6	58	69.0	n = 84 (16.7)	283	56.2	HIV+ DUs†
		30–39	139	33.1	23	27.4		162	32.1
		⩾40	56	13.3	3	3.6		59	11.7
		All	420	100.0	84	100.0		504	100.0
Kyrgyzstan	National	⩽20–24	75	26.3	8	50.1	n = 16 (5.3)	83	27.6	HIV positiveDUs†
		25–29	74	26.0	3	18.8		77	25.6
		30–39	102	35.8	3	18.8		105	34.9
		⩾40	34	12.0	2	12.5		36	12.0
		All	285	100.0	16	100.0		301	100.0
Latvia	National	⩽20–24	723	50.3	259	61.9	n = 418 (22.5)	982	52.8	HIV+ DUs†
		25–29	322	22.4	69	16.5		391	21.1
		30–39	313	21.8	65	15.6		378	20.4
		⩾40	81	5.7	25	5.9		106	5.7
		All	1439	100.0	418	100.0		1857	100.0
Lithuania	National	⩽20–24	132	23.1	17	32.1	n = 53 (8.48)	149	23.9	HIV+ DUs†
		25–29	159	27.8	13	24.5		172	27.5
		30–39	212	37.1	18	34.0		230	36.8
		⩾40	69	12.1	5	9.4		74	11.9
		All	572	100.0	53	100.0		625	100.0
Moldova	National	⩽20–24	142	13.0	39	14.0	n = 279 (8.48)	181	13.2	HIV+ DUs†
		25–29	12	1.1	4	1.4		16	1.2
		20–29	625	57.3	162	58.1		787	57.5
		30–39	261	23.9	67	24.0		328	24.0
		⩾40	50	4.6	7	2.6		57	4.2
		All	1090	100.0	279	100.0		1369	100.0
Poland	National	⩽20–24	1457	39.3	679	60.2	n = 1128 (23.9)	2094	44.4	HIV+ DUs†
		25–29	1078	30.0	248	22.0		1326	28.1
		30–39	937	26.0	166	14.7		1103	23.4
		⩾40	164	4.6	35	3.1		199	4.2
		All	3594	100.0	1128	100.0		4722	100.0
Romania	National	20–29	6	85.7	1	100.0	n = 1 (8.0)	7	87.5	HIV+ DUs†
		30–39	1	14.3	0	0.0		NA	NA
		All	7	100.0	1	100.0		8	100.0
Russia	National	⩽20–24	63,388	61.5	17 556	70.8	n = 24,757 (19.4)	80 944	63.3	HIV+ DUs†
		25–29	23,998	23.3	4498	18.2		28 496	22.3
		30–39	12,682	12.3	2264	9.1		14 946	11.7
		⩾40	3105	3.0	439	1.8		3544	2.8
		All	103,173	100.0	24757	100.0		127 930	100.0
South & South East Asia
Bangladesh	11 samples collapsed in one**	⩽20–24	517	14.2	1	5.9	n = 17 (0.5)	518	14.1	Sentinel surveillance groups
		25–29	892	24.5	5	29.4		897	24.5
		30–34	758	20.8	5	29.4		763	20.8
		35–39	625	17.2	2	11.8		627	17.1
		⩾40	852	23.4	4	23.6		856	23.4
		All	3644	100.0	17	100.0		3661	100.0
India	Kolkata	⩽20–24	11	5.6	(Only men)					Specific study‡
		25–29	28	14.4
		30–34	55	28.2
		35–39	59	30.3
		⩾40	42	21.4
		All	195	100
Indonesia	Jakarta	⩽20–24	147	70.0						Specific study§
		25–29	44	21.0
		30–35	9	4.3
		>35	10	4.8
		All	210	100.0
Iran	Mashhad (2 samples)	⩽20–24	85	26.3						Specific study¶
		25–29	79	24.4
		30–34	72	22.3
		35–39	49	15.2
		⩾40	38	11.8
		All	323	100.0