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Table 2 Results of the regression analysis for the duration of drug use

From: Patients in long-term maintenance therapy for drug use in Italy: analysis of some parameters of social integration and serological status for infectious diseases in a cohort of 1091 patients

Characteristics   Coeff. † 95%CI ‡ p-value*
Recruitment site (ref.: centre no. 1) centre no. 2 2.14 (-0.92, 5.21) 0.1703
  centre no. 3 -2.29 (-4.44, -0.13) 0.0376
  centre no. 4 1.35 (-1.05, 3.74) 0.2696
  centre no. 5 3.33 (1.36, 5.31) 0.0010
  centre no. 6 2.11 (-0.63, 4.86) 0.1315
  centre no. 7 1.17 (-1.92, 4.26) 0.4569
  centre no. 8 2.60 (-0.12, 5.32) 0.0607
  centre no. 9 -0.25 (-2.34, 1.85) 0.8163
  centre no. 10 -1.88 (-4.86, 1.10) 0.2169
  centre no. 11 -1.76 (-4.96, 1.45) 0.2825
  centre no. 12 0.50 (-2.89, 3.90) 0.7702
  centre no. 13 -0.50 (-2.46, 1.46) 0.6166
  centre no. 14 -1.13 (-4.17, 1.91) 0.4655
  centre no. 15 0.78 (-1.58, 3.13) 0.5176
  centre no. 16 1.75 (-0.18, 3.69) 0.0751
Sex (Ref.: Females) Males 1.51 (0.42, 2.60) 0.0068
Therapy (ref: Methadone) Buprenorphine -1.35 (-2.73, 0.03) 0.0557
Education (ref: Primary) Middle -2.10 (-3.59, -0.61) 0.0058
  Vocational -3.37 (-5.17, -1.56) 0.0003
  Secondary or higher -4.23 (-6.03, -2.43) <0.0001
Employment (ref: Employed) Unemployed 0.48 (-0.59, 1.55) 0.3780
  Other 0.21 (-1.58, 1.99) 0.8210
Living status (ref: Parents) Partner 4.85 (3.57, 6.13) <0,0001
  Alone 2.25 (1.08, 3.53) 0,0002
  Friends -1.62 (-4.54, 1.31) 0.2783
Partner (ref: No steady partner) Steady and unmarried -2.75 (-3.85, -1.65) <0,0001
  Steady and married -2.23 (-3.87, -0.59) 0.0076
  1. † Coeff.: regression coefficient; ‡ 95% Confidence Interval; * p-value for the significance of the single factor.