The risk of HIV transmission at each step of the HIV care continuum among people who inject drugs: a modeling study

Table 1 Baseline Demographic, HIV Prevalence, and HIV Treatment Parameters for Simulated New York City Population, 2012

Variable	Population
	MSM	HM	Female	PWID^a	Source
Demographics
Total population size (%)	5.00	45.00	50.00	2.67	Calculated, [24, 49, 50]
HIV prevalence (%)	22.00	0.30	0.90	17.0 (M), 22.3 (F)	Calculated, [22, 23]
HIV Treatment Parameters
Proportion diagnosed at baseline	0.77	0.86	0.86	0.61 (M), 0.78 (F)	[19, 22, 25, 51]
Proportion of those diagnosed on ART at baseline	0.57	0.63	0.63	0.55	[25]
Proportion achieving viral suppression^b	0.84	0.76	0.76	0.69	[25]

Abbreviations: ART antiretroviral therapy, HIV human immunodeficiency virus, PWID people who inject drugs
Note: These parameters values apply to the adult population simulated for this analysis, defined as aged >19 years
Note: HIV prevalence within each subpopulation as well as the overall PWID population size were calculated using surveillance estimates obtained from the New York City Department of Health and Mental Hygiene and estimates of population size, as described in the Estimating HIV Prevalence and Incidence section of the Additional file 1
^aWhere estimates differ among male and female PWID, they are indicated by an “M” and “F”, respectively
^bViral suppression is defined as having a viral load measurement of <200 copies/mL

ISSN: 1471-2458