Improved benchmark-multiplier method to estimate the prevalence of ever-injecting drug use in Belgium, 2000–10

Table 2 Results of the Monte Carlo (MC) simulation study estimating the prevalence of ever Injecting Drug Use (IDU), Belgium, 2000-10

	Number of seropositive IDUs		Number of alive seropositive IDUs		Number of alive IDUs		Prevalence (/1000)
Year	Est^*.	95% MI CI^Ɨ	Est^*.	95% MI CI^Ɨ	Est^*.	95% MI CI^Ɨ	Est^*.	95% MI CI^Ɨ
2000	845	[814;877]	642	[612;673]	19497	[13540;27010]	2,9	[2.0;4.0]
2001	876	[848;906]	659	[630;690]	19989	[14147;27663]	3	[2.1;4.1]
2002	909	[879;940]	682	[654;713]	20721	[14724;28166]	3,1	[2.2;4.2]
2003	961	[932;993]	723	[692;755]	22191	[15927;30659]	3,3	[2.3;4.5]
2004	995	[964;1028]	744	[712;775]	22861	[16220;31947]	3,4	[2.4;4.7]
2005	1009	[978;1042]	749	[719;781]	22653	[15743;31955]	3,3	[2.3;4.7]
2006	1031	[997;1063]	758	[726;790]	23178	[16362;31976]	3,4	[2.4;4.6]
2007	1061	[1029;1095]	779	[747;812]	23704	[16583;32937]	3,4	[2.4;4.7]
2008	1080	[1049;1112]	792	[761;826]	24026	[16844;32958]	3,4	[2.4;4.7]
2009	1094	[1062;1127]	798	[766;831]	24358	[17013;33951]	3,4	[2.4;4.8]
2010	1113	[1079;1147]	809	[775;842]	24664	[17565;34403]	3,5	[2.5;4.8]

ISSN: 2049-3258