The Pittsburgh Sleep Quality Index in a multi-ethnic Asian population contains a three-factor structure.
Sleep Breath
; 19(4): 1147-54, 2015 Dec.
Article
em En
| MEDLINE
| ID: mdl-25649251
ABSTRACT
PURPOSE:
The Pittsburgh Sleep Quality Index (PSQI) is a widely used measure for assessing sleep impairment. Although it was developed as a unidimensional instrument, there is much debate that it contains multidimensional latent constructs. We examined the dimensionality of the underlying factor structure of PSQI in Singapore, a rapidly industrialising Asian country with multi-ethnicities representing the Chinese, Malays and Indians.METHODS:
The PSQI was administered through an interviewer-based questionnaire in two separate population-based cross-sectional surveys. An explanatory factor analysis (EFA) was first used to explore the underlying construct of the PSQI in both studies. Then, a confirmatory factor analysis (CFA) was conducted to evaluate an optimal factor model by comparing against other possible models identified in EFA.RESULTS:
There are three correlated yet distinguishable factors that account for an individual's sleep experience from the same best-fit model obtained in both studies perceived sleep quality, daily disturbances and sleep efficiency. Our three-factor structure of PSQI is superior to the originally intended unidimensional model. Our model also shows the best-fit indices when compared to the previously reported single-factor, two-factor and three-factor (by Cole et al.) models in a multi-ethnic Asian population.CONCLUSION:
There is strong evidence that the PSQI contains a three-factor rather than a unidimensional structure in a multi-ethnic Asian population. Scoring the PSQI along their multidimensional perspectives may provide a more accurate understanding of the relationship between sleep impairment and health conditions rather than using a single global score.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Transtornos do Sono-Vigília
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Comparação Transcultural
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Inquéritos e Questionários
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Diversidade Cultural
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Povo Asiático
Tipo de estudo:
Observational_studies
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Prevalence_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adolescent
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Adult
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Aged
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Humans
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Middle aged
País como assunto:
Asia
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article