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Table 5 Substance use over prior 30 days

From: White matter deficits assessed by diffusion tensor imaging and cognitive dysfunction in psychostimulant users with comorbid human immunodeficiency virus infection

  Controls (n = 22) Patients (n = 21)
Alcohol (# using) 16 7**
Alcohol (# days) [4.2 ± 3.7 units] 4.6 ± 5.7 2.4 ± 6.5
Heroin (# using) 0 7**
Heroin (# days) [0.2 ± 0.15 g] 0 3.4 ± 7.9*
Cocaine powder (# using) 2 13**
Cocaine powder (# days) [0.52 ± 0.76 g] 1 9.4 ± 12.1**
Crack cocaine (# using) 0 19**
Crack cocaine (# days) [0.92 ± 1.65 g] 0 18.3 ± 12.3**
Amphetamines (# using) 0 6**
Amphetamines (# days) [0.38 ± 0.40 g] 0 4.0 ± 8.6*
Cannabis (# using) 4 13**
Cannabis (# days) [0.95 ± 0.68 g] 1.6 ± 5.6 14.3 ± 13.9**
  1. Numbers indicate either number of subjects per group using the drug (# using) or mean number of days per 30 days spent using the drug (# days) ± SEM. Significant difference between groups * p < 0.05, ** p < 0.01. For number of days using each drug, mean daily intake (± SEM) for both groups for cases who used the drug is included in square parentheses