Table 4.

Participant characteristics by genotype and group (N = 229)

	Control		HIV only		METH only		HIV and METH
	Val/Val or Val/Met	Met/Met	Val/Val or Val/Met	Met/Met	Val/Val or Val/Met	Met/Met	Val/Val or Val/Met	Met/Met
Characteristic	(N = 38)	(N = 11)	(N = 63)	(N = 9)	(N = 41)	(N = 9)	(N = 46)	(N = 12)
Age (years) M (sd)	35 (11)	40 (15)	39 (9)	40 (8)	36 (9)	35 (11)	37 (7)	36 (7)
Education (years) M (sd)	13 (1)	14 (2) *	13 (2)	13 (2)	13 (2)	13 (2)	13 (2)	14 (3)
WRAT4 M (sd)	102 (11)	108 (8)	101 (10)	107 (6)	95 (13)	102 (8)	99 (10)	98 (15)
Ethnicity (%) column
Caucasian	66	73	67	67	81	89	65	75
African-American	21	18	22	11	0	0	11	8
Hispanic	13	9	16	22	19	11	24	17
MDD (% lifetime)	16	36	43	56	33	33	51	41
Bipolar 1 or 11 (% lifetime)	0	0	5	0	5	0	7	8
Sedative (% lifetime)
Abuse	3	0	0	0	5	0	4	0
Dependence	0	0	0	0	0	0	0	0
Cannabis (% lifetime)
Abuse	27	0*	11	11	41	14	33	33
Dependence	5	0	5	0	20	44	13	0
Opioid (% lifetime)
Abuse	0	0	0	0	7	0	7	0
Dependence	0	0	0	0	0	0	0	0
Cocaine (% lifetime)
Abuse	3	0	3	11	18	25	16	9
Dependence	0	0	0	0	15	22	1 1	33
Hallucinogen (% lifetime)
Abuse	5	0	3	0	20	0	4	17
Dependence	0	0	0	0	0	0	2	0
Alcohol (% lifetime)
Abuse	17	9	32	11	40	78*	37	42
Dependence	13	0	6	0	29	33	31	17
METH+ groups
Age at first METH use (mean yrs) M (sd)	-	-	-	-	22(8)	24(12)	24(7)	27 (9) *
Total METH use (mean yrs) M (sd)	-	-	-		12(5)	9(4)	11(6)	6(4)
Last use of METH (mean days) M (sd)	-	-	-		129(1 15)	1 10(59)	195(364)	104(121)
HIV+ Groups
HIV RNA, plasma (log copies/mL) M (sd)	-	-	3.5(1.1)	3.2(1.5)-	-	-	3.5(1.1)	3.7(1.0)

Notes: *P < 0.05;

Abbreviations: M. mean; sd, standard deviation; HIV, human immunodeficiency virus; METH, methamphetamine.