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Table 5 Correlations between Addiction Intensity Scale (AIS) scoring and some clinical and addictive characteristics

From: Does type and number of used substances affect the severity of illness in patients with substance use disorders?

  Addiction intensity score
R P value
Age of patients −0.073 0.462
Age of onset −0.319 0.001*
Duration of addiction 0.241 0.014*
Education 0.270 0.006*
Total number of substances 0.492 < 0.001*
Current number of substances 0.203 0.039*
  1. Pearson’s correlation
  2. *Significant correlation at p value < 0.05