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Table 1 Baseline characteristics of 40 patients with DSM-IV opioid dependence randomly assigned to receive baclofen or placebo.

From: Baclofen for maintenance treatment of opioid dependence: A randomized double-blind placebo-controlled clinical trial [ISRCTN32121581]

Variable Baclofen (N = 20) Placebo (N = 20)
  Mean SD Mean SD
Age (years) 35.1 10.9 31.8 6.5
Age of onset of opioid use 23.2 6.2 21.0 4.9
Duration of opioid use (years) 8.8 6.2 7.0 4.9
Number of previous abstinences 3.7 2.2 2.2 1.9
Duration of the longest previous abstinence (months) 4.4 5.5 4.1 5.6
Income per month (Rials/10000) 81.7 69.3 99.5 103.7
  N % N %
Sex (male) 20 100 20 100
Married 14 70 10 50
College education 2 10 2 10
Employed 14 70 10 50
Substance use in patient's family 13 65 17 85
Type of opioid     
   Heroin 7 35 6 30
   Opium 13 65 14 70
Route of opioid use     
   Inhalation or ingestion 12 60 10 50
   Injection or multiple routes 8 40 10 50
Psychiatric illness 5 25 8 40
Medical illness 1 5 0 0