Table 1.

Demographic and Clinical Characteristics of the Sample Over Time

	Calendar year
Characteristic	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010
Patients in care, no.a	1304	1313	1504	1582	1735	1882	1975	1965	2010	1937	1891	1930	1968	1979	1983
Age, median, years	38	38	39	40	41	41	42	43	44	45	45	46	47	48	49b
Sex, % male	71	67	66	66	66	65	65	64	64	64	64	65	65	65	65b
Race, %
Black	73	76	76	75	74	74	74	73	73	74	74	74	74	73	73
White	25	23	23	23	24	24	25	25	25	24	24	24	23	24	24
Transmission risk, %c
Injection drug use	46	48	48	47	44	41	40	39	39	37	35	34	34	34	36b
Men who have sex with men	34	31	29	30	30	29	29	28	28	28	28	28	29	28	28
Heterosexual	43	45	45	44	47	48	48	50	50	49	49	49	51	51	51b
ZIP code, %
Baltimore city	85	85	85	83	83	82	81	81	81	81	81	81	80	80	80
Other Maryland	12	12	12	12	13	13	13	12	13	13	14	13	13	14	14
CD4 T-cell count, median, cells/mm3	239	290	304	296	315	328	352	340	347	377	385	406	421	435	444b
Receiving HAART, %d	22	51	58	66	69	71	70	70	75	77	79	80	83	84	85b

^aDefined as attending ≥2 clinic visits during the year.

^bP < .05 for trend from 1996 to 2010.

^cTransmission categories are not mutually exclusive.

^dHAART, highly active antiretroviral therapy.