Table 5 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)

General information

Sex

− 0.336

0.157

4.578

0.715

0.525–0.972

< 0.05

Age

0.003

0.017

0.029

1.003

0969–1.038

0.86

Body mass index

0.138

0.190

0.528

1.148

0.791–1.666

0.47

Frequency of overseas trips

− 0.040

0.035

1.314

0.961

0.897–1.029

0.25

Daily schedule

Earliest training-practice start time

0.028

0.030

0.894

1.029

0.970–1.091

0.34

Latest training-practice end time

− 0.055

0.039

1.952

0.947

0.877–1.022

0.16

Hours of training-practice per week

− 0.006

0.007

0.780

0.994

0.980–1.008

0.38

Bed time

− 0.222

0.083

7.200

0.801

0.682–0.942

< 0.01

Getting up time

0.123

0.078

2.474

1.131

0.970–1.319

0.12

Time in bed

− 0.357

0.081

19.586

0.700

0.598–0.820

< 0.001

Nap duration

0.161

0.159

1.025

1.175

0.860–1.604

0.31

Clinical information

Loud snoring

0.105

0.122

0.743

1.111

0.874–1.412

0.39

Sleep apnea

0.044

0.246

0.032

1.045

0.645–1.693

0.86

Legs twitching or jerking during sleep

− 0.183

0.103

3.151

0.833

0.680–1.019

0.08

Disorientation or confusion during sleep

− 0.215

0.186

1.341

0.806

0.560–1.161

0.25

Mood

Depressive mood

− 1.363

0.194

49.569

0.256

0.175–0.374

< 0.001

Sleep hygiene

Being bathed in sunlight after getting up

− 0.318

0.161

3.876

0.728

0.530–0.999

< 0.05

Eating breakfast every morning

− 0.763

0.194

15.395

0.466

0.319–0.683

< 0.001

Not taking a nap after 15:00

− 0.224

0.159

1.984

0.799

0.585–1.092

0.16

Not going out to bright places after 21:00

− 0.150

0.164

0.831

0.861

0.624–1.188

0.36

Avoid using electronic devices just before bed time

− 0.833

0.285

8.580

0.435

0.249–0.759

< 0.01

Not drinking alcohol to induce sleep

− 0.462

0.197

5.506

0.630

0.429–0.927

< 0.05

Not thinking about troubles in bed

1.066

0.166

41.021

2.903

2.095–4.023

< 0.001

Keeping the bedroom quiet and comfortable

− 0.645

0.222

8.423

0.525

0.339–0.811

< 0.01

Using a comfortable mattress and bedclothing

0.569

0.166

11.726

1.766

1.275–2.445

< 0.001

Preventing an irregular getting up time (within 2 h)

− 0.614

0.163

14.276

0.541

0.392–0.744

< 0.001

General information

Sex

− 0.147

0.188

0.608

0.863

0.597–1.368

0.44

Daily schedule

Bed time

0.099

0.109

0.823

1.104

0.891–1.368

0.36

Time in bed

0.401

0.106

14.319

1.494

1.213–1.839

< 0.001

Mood

Depressive mood

− 1.170

0.212

30.496

0.310

0.205–0.470

< 0.001

Sleep hygiene

Being bathed in sunlight after getting up

− 0.166

0.185

0.802

0.847

0.589–1.218

0.37

Eating breakfast every morning

− 0.593

0.225

6.955

0.552

0.355–0.859

< 0.01

Avoid using electronic devices just before bed time

− 0.625

0.313

3.989

0.535

0.290–0.988

< 0.05

Not drinking alcohol to induce sleep

− 0.174

0.224

0.606

0.840

0.541–1.303

0.44

Not thinking about troubles in bed

− 0.759

0.184

16.962

0.468

0.326–0.672

< 0.001

Keeping the bedroom quiet and comfortable

− 0.312

0.254

1.510

0.732

0.445–1.204

0.22

Using a comfortable mattress and bedclothing

− 0.214

0.192

1.248

0.807

0.554–1.176

0.26

Preventing an irregular getting up time (within 2 h)

− 0.328

0.184

3.182

0.720

0.503–1.033

0.07