Reliability and validity of the Hungarian version of the Pittsburgh Sleep Quality Index (PSQI-HUN): comparing psychiatric patients with control subjects

Apr 27, 2016Sleep & breathing = Schlaf & Atmung

Accuracy of the Hungarian Sleep Quality Survey in Psychiatric Patients and Healthy People

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Abstract

The internal consistency of the Hungarian version of the Pittsburgh Sleep Quality Index (PSQI-HUN) was measured at 0.79.

High correlations (0.59-0.88) between component scores and global scores suggest the PSQI-HUN is a homogeneous scale.
Significant differences in global and component scores were found between psychiatric patients and healthy controls.
Schizophrenia patients scored lower on the PSQI-HUN compared to those with recurrent depressive disorder and mixed anxiety and depressive disorder.
Convergent validity was supported by significant correlations between the Athens Insomnia Scale and the PSQI-HUN scores, except for the sleep latency component.

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PURPOSE: The Pittsburgh Sleep Quality Index is used to evaluate subjective sleep quality, and it is commonly used in clinical research. Subjective sleep quality is also an important clinical measure in patients with psychiatric disorders. The aim of the present study was to evaluate the reliability and validity of the Hungarian version of the Pittsburgh Sleep Quality Index (PSQI-HUN) in both clinical and non-clinical samples.

METHODS: The original version of PSQI was translated into Hungarian according to standard guidelines. The PSQI-HUN and the Athens Insomnia Scale (AIS) were subsequently administered to 53 psychiatric patients (schizophrenia, recurrent depressive disorder, mixed anxiety, and depressive disorder) and 178 healthy controls.

RESULTS: Internal consistency as measured by Cronbach's alpha in the whole sample was 0.79. Pearson's product-moment correlations between component scores and the global scores were high (0.59-0.88) in the PSQI-HUN indicating the homogeneity of the scale. PSQI-HUN global and component scores differed significantly between psychiatric patients and control subjects. In the psychiatric patient subsample, schizophrenics had lower global scores compared to the other two patient groups. The analysis of convergent validity showed significant correlations between the AIS and the global as well as the component scores of the PSQI-HUN (except the component of sleep latency).

CONCLUSIONS: The present study concludes that the PSQI-HUN is a reliable, valid, and standardized measure for assessment of the subjective sleep quality in clinical and research settings.

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Reliability and validity of the Hungarian version of the Pittsburgh Sleep Quality Index (PSQI-HUN): comparing psychiatric patients with control subjects

Abstract

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