Pearson’s r

P value

Total PSQI score

Hemoglobin

−0.369

0.021

Subjective sleep quality

0.820

<0.001

Sleep latency

0.759

<0.001

Sleep duration

0.718

<0.001

Sleep efficiency

0.815

<0.001

Sleep medication

0.349

0.019

Sleep disturbance

0.565

<0.001

Daytime dysfunction

0.395

0.006

Leg twitching or jerking

0.297

0.047

Anxiety

0.361

0.014

Subjective sleep quality

Sleep latency

0.580

<0.001

Sleep duration

0.495

<0.001

Sleep efficiency

0.609

<0.001

Sleep disturbance

0.511

<0.001

Sleep latency

Sleep duration

0.455

0.02

Sleep efficiency

0.585

<0.001

Sleep disturbance

0.560

0.001

Sleep duration

Sleep efficiency

0.705

<0.001

Anxiety

0.403

0.006

Habitual Sleep efficiency

Hemoglobin

−0.332

0.039

Sleep disturbance

0.335

0.023

Sleep medication

Employment

−0.301

0.044

Depression

0.326

0.019

Sleep disturbance

Sex (male)

0.306

0.039

hemoglobin

−0.369

0.021

Loud snoring or long breath pauses

0.303

0.041

Daytime dysfunction

Calcium serum

−0.40

0.028

Loud snoring or long breath pauses

Leg twitching or jerking

0.317

0.034

Leg twitching or jerking

Employment

−0.328

0.028