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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Drug Alcohol Depend. 2008 Dec 3;100(1-2):115–121. doi: 10.1016/j.drugalcdep.2008.09.017

Table 1.

Means (and standard deviation) of baseline characteristics of study participants by treatment group

Incentive Voucher with Coaching Medication Coaching Alone
Number of participants 34 32
Gender (% female) 35 47
Age (years) 44.0 (7.8) 42.6 (7.8)
Ethnicity
 Caucasian (%) 44 28
 African-American (%) 26 37
 Latino (%) 15 9
 Other (%) 17 26
Married (%) 24 3
Employed (full or part-time, %) 9 0
Yearly income < $10,000 (%) 85 81
Opiates (% positive urine screen) 35 41
Cocaine (% positive urine screen) 53 50
Addiction Severity Index drug composite 0.21 (0.1) 0.21 (0.1)
Addiction Severity index alcohol use composite 0.09 (0.2) 0.04 (0.1)
SF-36 physical health summary 24.6 (1.2) 24.3 (1.5)
Plasma HIV-1 RNA (copies) [median] 8,885 [57] 21,063 [0]
Plasma HIV-1 RNA < 75 copies/ml detection limit (%) 50.0 50.0
CD4+ (Cells/UL) 302 (198) 299 (330)
Adherence by electronic monitor during baseline period (%) 50.1 (17.2) 51.9 (20.0)
Adherence by pill count during baseline period (%) 70.5 (20.9) 79.1 (18.8)
Adherence by self-report during baseline period (%) 75.0 (22.4) 75.9 (25.0)