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Table 4 Correlation between PSQI items and job-related variables

From: Quality of sleep in a sample of Egyptian medical residency

Variables

Duration of residency

Days off

Monthly shifts

R

P value

R

P value

R

P value

PSQI-duration

− 0.140

0.089

− 0.054

0.508

0.205

0.012*

PSQI-disturbance

0.082

0.317

0.205

0.012*

− 0.121

0.139

PSQI-latency

0.185

0.024*

0.164

0.045*

0.236

0.004*

PSQI-day dysfunction

− 0.108

0.187

0.207

0.011*

0.258

< 0.001**

PSQI- Habitual sleep efficiency

− 0.002

0.979

− 0.076

0.357

− 0.024

0.770

PSQI-quality

− 0.078

0.343

− 0.103

0.210

0.208

0.011*

PSQI-medication intake

− 0.105

0.200

0.039

0.637

0.176

0.031*

PSQI-total

− 0.044

0.597

− 0.030

0.715

0.157

0.055

  1. *indicates the presence of significance **indicates highly significance. R correlation coefficient