**4.2. Statistic correlations among the evaluated indicators**

Applying some specific statistic methods (the SPSS program, Pearson, Spearman, Kendal correlations), we have evaluated the possible correlations among the analyzed indicators/parameters. Thus, we have obtained positive correlations which are statistically significant among the parameters (**Table 2**): age-length of consumption; age-length of consumption previous to the first MMT; length of the consumption – length of consumption previous to the first MMT; comorbidities – length of consumption previous to the first MMT (suggesting the positive influence of the treatment on the morbidity); the methadone dose - length of consumption previous to the first MMT; MMT number- number of previous hospitalizations. The MMT numbers previous to the presented study has correlated with the number of psychological counseling meetings and this underlines the importance of the psychological intervention, along with the pharmaceutical treatment with methadone.
