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Table 3 Predictors (crude and adjusted odds ratios) of smoking abstinence at 12 months

From: Heroin use impairs smoking cessation among Australian prisoners

  Point prevalence Continuous abstinence
  Crude Adjusted Crude Adjusted
Odds Ratio (95% CI) Odds ratio (95% CI) Odds Ratio (95% CI) Odds ratio (95% CI)
Active NOR versus placebo NOR 0.81 (0.46-1.42) 0.89 (0.49-1.62) 0.98 (0.54-1.77) 1.07 (0.57-2.00)
Age 35+ years 1.86 (1.06-3.25)† 1.46 (0.77-2.75) 1.64 (0.91-2.97) 1.36 (0.70-2.65)
Aboriginal origin 0.50 (0.19-1.31) 0.53 (0.19-1.48) 0.60 (0.23-1.56) 0.61 (0.22-1.72)
Left school no qualification 0.55 (0.31-1.01) - 0.70 (0.38-1.29) -
Institutionalised as a child 0.66 (0.36-1.21) - 0.60 (0.32-1.16) -
Homeless prior to prison 0.70 (0.21-2.39) - 0.82 (0.24-2.82) -
Employed while in prison 1.74 (0.87-3.48) - 1.89 (0.89-4.02) -
Tried to give up unsuccessfully 0.89 (0.51-1.57) - 0.75 (0.41-1.36) -
First time in prison 2.19 (1.25-3.84)† 1.47 (0.79-2.72) 2.52 (1.38-4.57)† 1.68 (0.88-3.20)
Incarcerated 5+ years at baseline 2.67 (1.44-4.96)† 2.30 (1.17-4.52)† 2.16 (1.11-4.20)† 1.88 (0.91-3.88)
Not regular drug use (excluding heroin) in year prior to prison 2.37 (1.33-4.19)† 1.31 (0.65-2.62) 2.39 (1.30-4.39)† 1.33 (0.64-2.75)
Not regular heroin use in year prior to prison 4.31 (1.98-9.36)† 3.81 (1.65-8.78)† 5.11 (2.13-12.29)† 4.29 (1.69-10.90)†
  1. Abbreviations: NOR = nortriptyline † P < 0.05.