Table 3 Predictors of abstinence at three stages of smoking treatment, by period

Group 2001-2005

End of the treatment

Stage of change (Preparation)

0.581

8.017

0.005

1.789

1.196-2.675

N° cig./day (<25 cig./day)

0.631

10.048

0.002

1.879

1.272-2.774

MDE past (yes)

-0.521

5.488

0.019

0.594

0.384-0.918

Depressive disorder (current) (yes)

-0.785

4.371

0.037

0.456

0.218-0.952

Constant

0.060

0.124

0.725

1.062

6-month follow-up

N° cig./day (<25 cig./day)

0.465

4.972

0.026

1.592

1.058-2.395

Depressive disorder (current) (yes)

-1.822

8.942

0.003

0.162

0.049-0.534

Constant

-0.962

35.605

0.000

0.382

12-month follow-up

Stage of change (Preparation)

0.728

11.730

0.001

2.071

1.365-3.142

Depressive disorder (current) (yes)

-1.424

6.997

0.008

0.241

0.084-0.691

Constant

-1.195

64.924

0.000

0.303

Group 2006-2010

End of the treatment

N° cig./day (<25 cig./day)

1.035

22.324

0.001

2.815

1.833-4.325

MDE (past) (yes)

-0.689

10.820

0.001

0.502

0.333-0.757

Constant

-0.265

1.906

0.167

0.767

6-month follow-up

N° cig./day (<25 cig./day)

0.614

5.596

0.018

1.848

1.111-3.075

Constant

-1.560

50.293

0.000

0.210

12-month follow-up

N° cig./day (<25 cig./day)

0.577

4.622

0.032

1.781

1.052-3.013

Constant

-1.660

53.275

0.000

0.190