| RSN | Rotating-shift nurses |
| DSN | Day-shift nurses |
| CAR | The cortisol awakening response |
| PPG | Photoplethysmography |
| PSG | Polysomnography |
| MEQ | Morningness–Eveningness Questionnaire |
| CMIA | Chemiluminescent microparticle immunoassay |
| IQR | Interquartile range |
| Rho | Spearman’s rank correlation coefficient |
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