Table 11 Results of a simple regression analysis of depression and psychological symptoms in predicting sleep disorders in breast cancer patients (N=93)

Beck depression

Insomnia

.445

198.

.436

.445

22.487

4.742

Hypersomnia

.406

.165

.204

.406

17.931

4.235

Interrupted sleep

.407

.165

.262

.407

18.016

4.245

Nightmare disorder

.444

.198

.246

.444

22.403

4.733

Night dismay

.494

.244

.339

.494

29.406

5.423

Sleep walking disorder

.478

.229

.257

.478

26.986

5.195

Total sleep disorder

.502

.252

1.736

.502

30.666

5.538

Somatization

Insomnia

.272

.074

2.364

.272

7.245

2.692

Hypersomnia

.237

.056

1.058

.237

5.393

2.322

Interrupted sleep

.267

.071

1.533

.579

7.006

2.647

Nightmare disorder

.303

.092

1.598

.303

9.207

3.034

Sleep walking disorder

.386

.149

1.847

.462

15.963

3.995

Total sleep disorder

.306

.049

9.559

.306

9.429

3.071

Obsession

Insomnia

.343

.118

3.367

.343

12.134

3.483

Hypersomnia

.243

.059

1.226

.243

5.717

2.391

Nightmare disorder

.347

.120

2.060

.585

12.422

3.525

Night dismay

.284

.062

1.707

.284

5.983

2.446

Sleep walking disorder

.426

.181

2.297

.426

20.177

4.492

Total sleep disorder

.339

.115

11.937

.339

11.841

3.441

Anxiety

Insomnia

.326

.106

3.039

.326

10.805

3.287

Hypersomnia

.297

.088

1.424

.297

8.811

2.968

Interrupted sleep

.319

.101

1.957

.319

10.280

3.206

Nightmare disorder

.312

.097

1.763

.312

9.812

3.134

Night dismay

.222

.049

1.450

.222

4.713

2.171

Sleep walking disorder

.327

.107

1.674

.327

10.867

3.297

Total sleep disorder

.338

.114

11.308

.338

11.753

3.428

Hostility

Insomnia

.268

.072

2.121

.268

7.054

2.656

Hypersomnia

.243

.059

.987

.243

5.710

2.390

Interrupted sleep

.225

.051

1.174

.225

4.870

2.207

Nightmare disorder

.315

.099

1.510

.315

10.053

3.171

Sleep walking disorder

.242

.059

1.051

.242

5.658

2.379

Total sleep disorder

.275

.076

7.796

.275

7.453

2.730

Phobic anxiety

Insomnia

.380

.144

2.615

.380

15.358

3.919

Interrupted sleep

.318

.101

1.440

.318

10.215

3.196

Nightmare disorder

.403

.162

1.680

.403

17.645

4.201

Night dismay

.275

.076

1.326

.275

7.459

2.731

Sleep walking disorder

.253

.064

.958

.253

6.249

2.500

Total sleep disorder

.354

.125

8.718

.354

12.996

3.605

Paranoid ideation

Insomnia

.250

.063

2.136

.250

6.056

2.467

Hypersomnia

.243

.059

1.066

.243

5.718

2.391

Interrupted sleep

.230

.053

1.292

.230

5.082

2.254

Sleep walking disorder

.225

.051

1.056

.225

4.870

2.207

Total sleep disorder

.211

.045

6.457

.211

4.248

2.061

Psychoticism

Insomnia

.363

.132

4.174

.363

13.823

3.718

Hypersomnia

.233

.054

1.374

.233

5.206

2.282

Interrupted sleep

.220

.048

1.662

.220

4.609

2.147

Nightmare disorder

.330

.109

2.296

.330

11.107

3.333

Sleep walking disorder

.362

.131

2.284

.362

13.708

3.702

Total sleep disorder

.324

.105

13.329

.324

10.643

3.262