Table 1. Sociodemographic and clinical characteristics of HIV-infected individuals.

	Rapid progressors	Classic progressors	Viremic slow progressors	Aviremic slow progressors	P
Characteristics	(n = 13)	(n = 17)	(n = 7)	(n = 6)
Age at first visit (years)	34±7	38±8	46±9	44±9	0.005a
Sex (male/female)	12/1	17/0	7/0	3/3	0.005
Race (white/other)	12/1	16/1	6/1	5/1	NS
CD4+ T cells/mm3
Acute phase	533±140	781±213	na	na	0.002
Early phase	446±40	714±46	na	na	0.0008
Chronic phase	443±193	629±244	562±122	888±122	0.011b
Nadir	254±118	432±140	506±129	506±175	0.0005c
Viremia, ×103 copies/ml d
Acute phase	366±705	76±126	na	na	NS
Early phase	121±186	71±190	na	na	NS
Chronic phase	7.65±15.3	37.7±62.3	3.01±1.86	<0.05d	0.003e
Peak	570±808	202±236	8.5±6.5	0.065±0.027	0.0001f

Age, CD4 and viremia are expressed as mean ±SD. Sex and race were compared using Fisher exact test. Pairwise comparisons of CD4 and viremia for early phases were performed using unpaired Student's t tests. Comparisons among all groups (age at first visit, CD4, viremia in the chronic phase, nadir CD4) were performed with the one-way analysis of variance test. n, numbers; NS, not significant; na, not available.

^aP = 0.004 and 0.050 for the comparison of age between rapid and viremic slow progressors, and classic and viremic slow progressors, respectively, as determined by the Mann-Whitney test.

^bP = 0.008 for the comparison of CD4+ T cells/mm³ in chronic phase between rapid progressors and aviremic slow progressors, as determined by the Mann-Whitney test.

^cP = 0.0008 and 0.001 and 0.020 nadir CD4 for the comparison between rapid and classic progressors, rapid and viremic slow progressors, and rapid and aviremic slow progressors, respectively, as determined by the Mann-Whitney test.

^dFifty copies/ml corresponds to the detection threshold of the viral load test.

^eP = 0.002 and 0.002 for the comparison of viremia in chronic phase between classic progressors and aviremic slow progressors, and viremic and aviremic slow progressors, respectively, as determined by the Mann-Whitney test.

^fP = 0.006, 0.0007, 0.0005, 0.0004 and 0.001 for the comparison of peak viremia between rapid progressors and viremic slow progressors, rapid progressors and aviremic slow progressors, classic progressors and viremic slow progressors, classic progressors and aviremic slow progressors, and viremic and aviremic slow progressors, respectively, as determined by the Mann-Whitney test.