Enhanced Collection of Laboratory Data in HIV Surveillance Among 5 States with Confidential Name-based HIV Infection Reporting, 2005-2006

Table 1C: Stage of HIV Infection Based on CD4 Test^a Performed within 3, 6, and 12 Months Following HIV Diagnosis Among Adults and Adolescents in 25 States without Enhanced Data Collection (Population B^d), 2005-2006

	≤3 mo		≤6 mo		≤12 mo
	No.	(%)	No.	(%)	No.	(%)
Stage 1	952	9.0	1,051	9.9	1,152	10.8
Stage 2	2,104	19.8	2,305	21.7	2,518	23.7
Stage 3 (AIDS)	3,412	32.1	3,575	33.6	3,743	35.2
Stage unknown	4,161	39.1	3,699	34.8	3,217	30.3
Missing CD4 collection date	2	0	1	0	1	0
Total	10,631	100	10,631	100	10,631	100

^a The lowest CD4 count or percentage taken from the time period of interest.

^b Colorado, Indiana, Louisiana, Michigan (diagnosed between April 1, 2005 through March 31, 2006) and New York (diagnosed between June 1, 2005 and May 31, 2006).

^c Population A: Colorado, Indiana, Louisiana, Michigan (diagnosed between April 1, 2004 through March 31, 2005) and New York (diagnosed between June 1, 2004 and May 31, 2005).

^d Population B: Persons diagnosed with HIV in 25 states that had ≥50% of persons newly diagnosed between April 1, 2005 and March 31, 2006 with an initial CD4 or VL result collected ≤3 months of HIV diagnosis and reported to the national HIV surveillance system.