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      The Pittsburgh sleep quality index: A new instrument for psychiatric practice and research

      , , , ,
      Psychiatry Research
      Elsevier BV

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          Abstract

          <p class="first" id="d14989952e77">Despite the prevalence of sleep complaints among psychiatric patients, few questionnaires have been specifically designed to measure sleep quality in clinical populations. The Pittsburgh Sleep Quality Index (PSQI) is a self-rated questionnaire which assesses sleep quality and disturbances over a 1-month time interval. Nineteen individual items generate seven "component" scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. The sum of scores for these seven components yields one global score. Clinical and clinimetric properties of the PSQI were assessed over an 18-month period with "good" sleepers (healthy subjects, n = 52) and "poor" sleepers (depressed patients, n = 54; sleep-disorder patients, n = 62). Acceptable measures of internal homogeneity, consistency (test-retest reliability), and validity were obtained. A global PSQI score greater than 5 yielded a diagnostic sensitivity of 89.6% and specificity of 86.5% (kappa = 0.75, p less than 0.001) in distinguishing good and poor sleepers. The clinimetric and clinical properties of the PSQI suggest its utility both in psychiatric clinical practice and research activities. </p>

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          Author and article information

          Journal
          Psychiatry Research
          Psychiatry Research
          Elsevier BV
          01651781
          May 1989
          May 1989
          : 28
          : 2
          : 193-213
          Article
          10.1016/0165-1781(89)90047-4
          2748771
          46f634af-0f65-4c1b-8a10-25dec134be50
          © 1989
          History

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