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. Author manuscript; available in PMC: 2016 Mar 7.
Published in final edited form as: J Psychoactive Drugs. 2014 Jul-Aug;46(3):208–214. doi: 10.1080/02791072.2014.915363

Table 2.

Demographic and drug use characteristics by HIV testing status

Variable Prior HIV
testing
(n = 492)
Never tested
for HIV
(n = 85)
Statistics, p
Clinic, % (n) χ2 (5) = 94.42, p < .001
 Clinic A 5.5 (27) 3.5 (3)
 Clinic B 15.2 (75) 61.2 (52)
 Clinic C 20.5 (101) 16.5 (14)
 Clinic D 18.1 (89) 9.4 (8)
 Clinic E 11.8 (58) 0.0 (0)
 Clinic F 28.9 (142) 9.4 (8)
Age 36.5 (9.2) 36.2 (8.7) t (575) = 0.26, p = .79
Male gender, % (n) 50.4 (248) 65.9 (56) χ2 (1) = 6.96, p < .01
Hispanic ethnicity, % (n) 10.2 (50) 15.3 (13) χ2 (1) = 1.96, p =.16
Race, % (n) χ2 (2) = 20.4, p < .001
 Caucasian 30.1(148) 51.8 (44)
 African-American 57.7 (284) 31.8 (27)
 Other 12.2 (60) 16.5 (14)
Married, % (n) 12.2 (60) 18.8 (16) χ2 (1) = 2.78, p = .0 .10
Years of education 12.0 (1.9) 11.6 (2.1) t (575) = 1.75, p = .08
Income, median (IQR) $4,450
($16, 910)
$9,600
($20, 900)
U = 17477, p = .02
Employment status, % (n) χ2 (2) = 0.99, p = .61
 Full time 49.9 (226) 55.7 (44)
 Part time 24.3 (110) 20.3 (16)
 Unemployed/other 25.8 (117) 24.1 (19)
Cocaine dependent, % (n) 76.6 (377) 81.2 (69) χ2 (1) = 0.86, p = .36
Alcohol dependent, % (n) 52.6 (259) 50.6 (43) χ2 (1) = 0.12, p = .73
Opioid dependent, % (n) 23.0 (113) 21.4 (18) χ2 (1) = 0.10, p = .76
Years of regular use of:
 Alcohol 13.9 (10.8) 16.5 (10.2) t (575) = −2.01, p =.05
 Cocaine 9.1 (7.6) 10.5 (8.9) t (575) = −1.59, p =.11
 Heroin 1.8 (4.9) 2.2 (6.8) t (575) = − 0.63, p = .53
 Marijuana 7.9 (8.4) 7.6 (8.6) t (575) = 0.37, p =.71
Times treated for alcohol,
median (IQR)
1.0 (3.0) 2.0 (4.0) U = 18923, p = .14
Times treated for drugs,
median (IQR)
2.0 (4.0) 2.0 (5.0) U = 20624, p =.89
Psychiatric hospitalizations,
median (IQR)
0.0 (1.0) 0.0 (1.0) U = 20852, p =.96
Ever incarcerated, % (n) 51.6 (254) 42.4 (36) χ2 (1) = 2.49, p = .11
Addiction Severity Index scores
 Medical 0.23 (0.34) 0.16 (0.30) t (575) = 1.94, p = .05
 Employment 0.70 (0.29) 0.62 (0.31) t (575) = 2.40, p = .02
 Alcohol 0.23 (0.24) 0.24 (0.23) t (575) = −0.64, p = .52
 Drug 0.15 (0.10) 0.15 (0.10) t (574) = 0.08, p = .94
 Legal 0.14 (0.21) 0.15 (0.24) t (574) = −0.60, p = .55
 Family/social 0.18 (0.22) 0.17 (0.21) t (572) = 0.21, p = .83
 Psychiatric 0.26 (0.24) 0.32 (0.25) t (571) = −1.95, p = .05
HIV Risk Behavior Scale
Total score, median (IQR) 11.0 (8.0) 12.0 (7.0) U = 20299, p = .98
Drug score, median (IQR) 0.0 (1.0) 0.0 (0.0) U = 19774, p = .42
Sexual score, median (IQR) 10.0 (6.0) 11.0 (7.0) U = 19594, p = .57

Values represent means (SD=standard deviations) unless otherwise indicated. IQR=interquartile range.