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pqplaten under Sleep Questionnaires/Pittsburgh Sleep Quality Index (PSQI) in MROS variables
Subscore based on 2 items from Pittsburgh Sleep Quality Index, with a range of 0-3. A score of "0" indicates no difficulty, while a score of "3" indicates severe difficulty. Buysse et. al 1989 (PubMed ID: 2748771) Search for all PSQI variables within this dataset