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Validity of the Italian Version of the Pittsburgh Sleep Quality Index (PSQI)

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Abstract

The aim of this study is to validate the Italian version of the Pittsburgh Sleep Quality Index (PSQI), comparing five different groups of individuals (healthy young and elderly, sleep apnoea syndrome patients, depressed patients, individuals with dementia) by both questionnaire scores and polysomnographic measures. Fifty individuals (10 for each group) participated in the study. Each of them filled in the PSQI and slept for two consecutive nights in the sleep laboratory. The PSQI showed an overall reliability coefficient (Cronbach’s α) of 0.835, indicating a high degree of internal consistency. The mean PSQI global score showed significant differences between groups, with an impaired overall quality of sleep in patients’ groups with respect to both the healthy groups. Results also indicated that the best cut-off score (differentiating “good” from “bad” sleepers) is 5. Pittsburgh Sleep Quality Index is a useful, valid and reliable tool for the assessment of sleep quality, with an overall efficiency comparable to the mother language version and differentiate “good” from “bad” sleepers. The Italian version of the questionnaire provides a good and reliable differentiation between normal and pathological groups, with higher scores reported by people characterized by impaired objectively evaluated sleep quality.

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Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Dipartimento di Scienze della Salute, Università degli Studi dell’Aquila, Via Vetoio, Coppito 2, 67010, L’Aquila (AQ), Italy

    Giuseppe Curcio, Daniela Tempesta & Michele Ferrara

  2. IRCCS S. Raffaele, Via della Pisana 235, 00163 Roma-Casa di Cura S. Raffaele, Via Gaetano Di Biasio 1, 03043, Cassino (FR), Italy

    Giuseppe Curcio & Paolo Maria Rossini

  3. Unità di Fisiopatologia Respiratoria, Università Campus Bio-medico, Policlinico Universitario, Via A. Del Portillo 28, 00128, Rome, Italy

    Simone Scarlata

  4. Dipartimento di Psicologia, Sapienza Università di Roma, Via dei Marsi 78, 00185, Rome, Italy

    Cristina Marzano & Luigi De Gennaro

  5. Dipartimento di Psicologia, Alma Mater Studiorum, Università di Bologna, Viale Berti Pichat 5, 40127, Bologna, Italy

    Fabio Moroni

  6. Neurologia, Università Cattolica, Policlinico Gemelli, Largo A. Gemelli 8, 00168, Rome, Italy

    Paolo Maria Rossini

Authors
  1. Giuseppe Curcio
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  2. Daniela Tempesta
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  3. Simone Scarlata
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  4. Cristina Marzano
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  5. Fabio Moroni
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  6. Paolo Maria Rossini
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  7. Michele Ferrara
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  8. Luigi De Gennaro
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Correspondence to Giuseppe Curcio.

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Curcio, G., Tempesta, D., Scarlata, S. et al. Validity of the Italian Version of the Pittsburgh Sleep Quality Index (PSQI). Neurol Sci 34, 511–519 (2013). https://doi.org/10.1007/s10072-012-1085-y

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  • DOI: https://doi.org/10.1007/s10072-012-1085-y

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