CONFIRMATORY FACTOR ANALYSIS OF A PORTUGUESE VERSION OF THE PITTSBURG SLEEP QUALITY INDEX

  • Carla M. Teixeira Dept. Educação e Psicologia, Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal.
  • Andreia Caçador Dept. Educação e Psicologia, Universidade do Porto, Porto, Portugal.
  • Tatiana M. Ferreira Dept. Educação e Psicologia, Universidade de Aveiro, Aveiro, Portugal.
  • José Vasconcelos-Raposo Dept. Educação e Psicologia, INESC TECH - Pólo UTAD, Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal.

Abstract

The purpose of the present study is to determine the reliability and factorial validity of a Portuguese version of the Pittsburgh Sleep Quality Index - PSQI (Buysse, Reynolds III, Monk, Berman, & Kupfer, 1989). Methods: A random sample of 252 children (113 girls; 139 boys) attending the secondary school, with an average age of 15.27 years (SD = 1.925) that completed the Portuguese PSQI (P-PSQI). The factor structure of the data was evaluated using confirmatory factor analysis. Results: Once the ‘use of sleep medication’ component had been removed from the model it a good overall fit to the data was found (χ2/df = 1,194, GFI = .983, AGFI = .959, CFI = .980, RMSEA = .029 [.001- .076] AICsat = 42.0). These results confirm the theoretical strength of PSQI; however, we were unable to confirm the seven-factor structure proposed in the original version. Conclusions: The PSQI-P has good psychometric properties and is suitable for use in nomothetic research on sleep quality in Portuguese adolescents.

Published
Mar 16, 2018
How to Cite
TEIXEIRA, Carla M. et al. CONFIRMATORY FACTOR ANALYSIS OF A PORTUGUESE VERSION OF THE PITTSBURG SLEEP QUALITY INDEX. PsychTech & Health Journal, [S.l.], v. 1, n. 2, p. 15-23, mar. 2018. ISSN 2184-1004. Available at: <https://psychtech-journal.com/index.php/psychtech/article/view/psychtech-v1n2a02-2018>. Date accessed: 19 dec. 2018. doi: http://dx.doi.org/10.26580/PTHJ.art6.2018.

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