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

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)†