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Pittsburgh Sleep Quality Index: Sleep duration component subscore
pqpsldur
under Sleep Questionnaires/Pittsburgh Sleep Quality Index (PSQI) in
MROS variables
Subscore based on 1 item 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)
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