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Abbreviations of objective measures
| Abbreviations | Full Name |
|---|---|
| ECG | Electrocardiography |
| EEG | Electroencephalography |
| HF | High-frequency power |
| HR | Heart rate |
| HRV | Heart rate variability |
| LF | Low-frequency power |
| NREM | Non-rapid eye movement |
| PAL | Physical activity level |
| PSG | Polysomnography |
| REM | Rapid eye movement |
| RMSSD | Root mean square of successive differences |
| RSA | Respiratory sinus arrhythmia |
| SDRR | Standard deviation of normal R-R intervals |
| VLF | Very low-frequency power |
