Table 3 Self-reported mental health problems in the past 30 days in relation to high frequency of drug use, early onset of drug use and poly drug use (controlling for age and gender)

Constant

0.008

0.001

1.214

0.751

0.002

0.001

Age

1.264

0.001***

1.206–1.324

0.857

0.001***

0.802–0.915

1.296

0.001***

1.235–1.359

Gender

0.879

0.297

0.690–1.120

0.993

0.967

0.722–1.366

0.857

0.254

0.657–1.118

Depression

1.312

0.050

1.000–1.722

1.047

0.808

0.723–1.516

1.250

0.138

0.931–1.667

Anxiety

1.719

0.001***

1.318–2.241

1.412

0.068

0.975–2.045

1.358

0.048*

1.002–1.839

Concentration difficulties

1.408

0.003**

1.124–1.765

1.555

0.008**

1.122–2.155

1.434

0.007**

1.106–1.860

Aggressive behaviour

1.381

0.020*

1.052–1.812

1.576

0.007**

1.130–2.199

1.147

0.359

0.856–1.539

Suicidal thoughts

1.160

0.463

0.781–1.721

0.650

0.115

0.381–1.111

0.962

0.847

0.650–1.424

Hallucinations

0.849

0.501

0.526–1.368

1.601

0.099

0.915–2.803

1.652

0.041*

1.021–2.674

Eating disorders

1.549

0.054

0.993–2.419

1.304

0.318

0.774–2.197

1.146

0.545

0.737–1.783

Self-harming behaviour

0.880

0.599

0.546–1.418

0.601

0.849

0.460–1.567

1.102

0.692

0.682–1.778

Traumatic life event

0.986

0.910

0.775–1.255

1.335

0.075

0.971–1.836

1.302

0.043*

1.008–1.683

Cox & Snell

0.151

0.037

0.135

Nagelkerke

0.202

0.068

0.199