title: The Pittsburgh Sleep Quality Index (PSQI).
authors.forename: C
authors.initials: C
authors.lastname: Smyth
mesh_terms: D000368:Aged; D019985:Benchmarking; D015577:Geriatric Assessment; D006801:Humans; D009730:Nursing Assessment / Q000379:methods*; D009737:Nursing Records; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D012893:Sleep Wake Disorders / Q000145:classification / Q000175:diagnosis* / Q000451:nursing*