Factor

β factor

SE

Wald

df

Sig.

Odd ratio

Exp (B)

95.0% CI for Exp(B)

Lower

Upper

Sex

−1.243

0.523

5.654

1

0.017

0.289

0.104

0.804

Family support

0.669

0.187

12.851

1

0.000

1.953

1.354

2.815

Age

(under 30 years)

5.481

2

0.065

Age

(between 30 and 39)

0.029

0.227

0.016

1

0.898

1.029

0.660

1.606

Age

(above 40 years)

−0.409

0.217

3.544

1

0.060

0.664

0.434

1.017

Methadone dose

(<50 mg per day)

9.766

2

0.008

Methadone dose

(50 - 99 mg per day)

0.224

0.515

0.189

1

0.663

1.251

0.456

3.431

Methadone dose

(>150 mg per day)

−0.602

0.561

1.153

1

0.283

0.548

0.183

1.644