. Author manuscript; available in PMC: 2015 Nov 1.

Published in final edited form as: J Acquir Immune Defic Syndr. 2014 Nov 1;67(3):323–330. doi: 10.1097/QAI.0000000000000302

Table 1. Description of Data Sources.

	Population-Based Chart Review	National HIV Behavioral Surveillance	Medical Monitoring Project	HIV Case Surveillance	HIV Laboratory Surveillance
Population Sampled	Persons included in the HIV case surveillance database	Populations at high risk for HIV infection (persons with known HIV infection are included)	Persons in HIV medical care	Persons diagnosed with HIV currently residing in King County	Persons diagnosed with HIV currently residing in King County who had a CD4 or viral load test in a reporting laboratory in King County
Sampling Method and Frame	Randomly selected cases from all persons not identified through routine surveillance procedures to have died.	Venue-day-time sampling (VDTS) - MSM ^a cycles Respondent-driven sampling (RDS) - IDU ^b cycles	Three stage weighted, population-based sampling: Geographic area Medical facility Patients who completed a visit in the first 4 months of the year	Not applicable – Surveillance includes all mandatory name-based case reports. We included in-migrant, excluded out-migrants, and excluded persons who died prior to the end of 2011.	Mandatory laboratory reporting of all CD4 and VL results and actively collected results from individual case investigations
Calendar Years	2010	2008, 2011 (MSM)2012 (IDU)	2010	2011	2011
Sample Size	266	VDTS-based: 2008 MSM2: 3682011 MSM3: 371RDS-based:2012 IDU3: 686	313	Not applicable	6094
Response Rate	85% ^c	Participation rates ^d:MSM - 2008: 27%MSM - 2011: 20%	57% ^c	>99% ^e	Completeness of laboratory reporting unknown

Men who have sex with men

Injection drug users

Completeness of chart reviews

Participation rates cannot be calculated for IDU cycles due to RDS methodology

Estimate derived from matching records 3674 of 3679 cumulative MMP eligible participants with case surveillance in 2013