| AASM | American Academy of Sleep Medicine |
| AHI | Apnea–hypopnea index |
| ANOVA | Analysis of variance |
| BMI | Body mass index |
| CI | Confidence interval |
| DFG | Deutsche Forschungsgemeinschaft |
| EEG | Electroencephalogram |
| ECG | Electrocardiogram |
| EOG | Electrooculogram |
| OSA | Obstructive sleep apnea |
| PSQ | Polysomnography |
| SD | Standard deviation |
| SHIP | Study of Health in Pomerania |
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