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Table 7 The associations amongst sex, age, body mass index, experience of overseas trips, training-practice schedule, depressive mood and sleep habits, and poor sleep quality (PSQI global score > 5.5) in females

From: A Subjective Assessment of the Prevalence and Factors Associated with Poor Sleep Quality Amongst Elite Japanese Athletes

  

β

SE

Wald-square

Odds

95% CI

P value

(A) Univariate logistic regression analysis

General information

Age

0.024

0.023

1.131

1.024

0.980–1.070

0.296

 

Body mass index

0.047

0.043

1.191

1.048

0.964–1.139

0.878

 

Frequency of overseas trips

0.007

0.050

0.022

1.007

0.914–1.111

0.882

Daily schedule

Earliest training-practice start time

− 0.063

0.045

1.918

0.939

0.859–1.026

0.166

 

Latest training-practice end time

0.012

0.056

0.050

1.013

0.908–1.129

0.823

 

Hours of training-practice per week

0.006

0.009

0.458

1.006

0.988–1.025

0.499

 

Bed time

0.141

0.125

1.280

1.151

0.902–1.470

0.258

 

Getting up time

− 0.277

0.127

4.794

0.758

0.591–0.971

0.029

 

Time in bed

− 0.378

0.120

9.895

0.685

0.542–0.867

0.002

 

Nap duration

0.361

0.233

2.411

1.435

0.910–2.265

0.121

Clinical information

Loud snoring

− 0.024

0.251

0.009

0.976

0.597–1.596

0.923

 

Sleep apnea

1.061

0.772

1.888

2.889

0.636–13.121

0.169

 

Legs twitching or jerking during sleep

0.336

0.227

2.183

1.399

0.896–2.185

0.140

 

Disorientation or confusion during sleep

0.316

0.350

0.814

1.371

0.691–2.723

0.367

Mood

Depressive mood

1.036

0.257

16.218

2.817

1.702–4.663

0.000

Sleep hygiene

Being bathed in sunlight after getting up

0.187

0.225

0.693

1.206

0.776–1.873

0.405

 

Eating breakfast every morning

0.848

0.301

7.908

2.334

1.293–4.214

0.005

 

Not taking a nap after 15:00

0.343

0.224

2.342

1.409

0.908–2.186

0.767

 

Not going out to bright places after 21:00

0.086

0.224

0.147

1.090

0.703–1.689

0.701

 

Avoid using electronic devices just before bed time

0.772

0.410

3.546

2.164

0.969–4.835

0.060

 

Not drinking alcohol to induce sleep

1.024

0.329

9.677

2.784

1.461–5.308

0.002

 

Not thinking about troubles in bed

0.880

0.235

13.963

2.410

1.519–3.823

0.000

 

Keeping the bedroom quiet and comfortable

0.624

0.340

3.369

1.865

0.959–3.630

0.066

 

Using a comfortable mattress and bedclothing

0.454

0.234

3.776

1.574

0.996–2.489

0.052

 

Preventing an irregular getting up time (within 2 h)

0.701

0.230

9.317

2.015

1.285–3.159

0.002

(B) Multiple logistic regression analysis

Daily schedule

Getting up time

− 0.353

0.169

4.390

0.702

0.505–0.977

0.036

 

Time in bed

− 0.173

0.154

1.257

0.842

0.622–1.138

0.262

Mood

Depressive mood

0.922

0.277

11.092

2.515

1.462–4.329

0.001

Sleep hygiene

Eating breakfast every morning

0.622

0.336

3.429

1.862

0.964–3.595

0.064

 

Not drinking alcohol to induce sleep

0.652

0.356

3.359

1.920

0.956–3.857

0.067

 

Not thinking about troubles in bed

0.692

0.254

7.403

1.997

1.213–3.286

0.007

 

Preventing an irregular getting up time (within 2 h)

0.653

0.258

6.394

1.921

1.158–3.185

0.011