INTRODUCTION: The Pittsburgh Sleep Quality Index (PSQI) has become a standard instrument to measure sleep quality. However, its factor structure has not been fully explored and the available Spanish versions have revealed the need to make adaptations. Our objective was to assess the factor structure and reliability of the PSQI. METHODS: Eighty seven psychiatric patients without treatment and 48 control subjects underwent psychiatric structured assessment and completed the PSQI. Internal consistency and factor structure of PSQI was measured and the scale scores were compared between groups and by gender. Association with age was also calculated. RESULTS: There were no significant differences between psychiatric patients and control subjects on age and gender. Subjects had no problem understanding and answering the questions in the instrument. The PSQI displayed a satisfactory reliability coefficient (0.78) and component-total score correlations were all significant (0.53-0.77). The PSQI showed two main factors: sleep duration and sleep quality. Patients obtained significantly higher scores than controls, in both the global and the component scores, with the exception of sleep duration. The PSQI scores were not significantly different between males and females and were not associated with age. CONCLUSIONS: The PSQI is a reliable instrument to measure sleep quality in Mexican subjects.
INTRODUCTION: The Pittsburgh Sleep Quality Index (PSQI) has become a standard instrument to measure sleep quality. However, its factor structure has not been fully explored and the available Spanish versions have revealed the need to make adaptations. Our objective was to assess the factor structure and reliability of the PSQI. METHODS: Eighty seven psychiatricpatients without treatment and 48 control subjects underwent psychiatric structured assessment and completed the PSQI. Internal consistency and factor structure of PSQI was measured and the scale scores were compared between groups and by gender. Association with age was also calculated. RESULTS: There were no significant differences between psychiatricpatients and control subjects on age and gender. Subjects had no problem understanding and answering the questions in the instrument. The PSQI displayed a satisfactory reliability coefficient (0.78) and component-total score correlations were all significant (0.53-0.77). The PSQI showed two main factors: sleep duration and sleep quality. Patients obtained significantly higher scores than controls, in both the global and the component scores, with the exception of sleep duration. The PSQI scores were not significantly different between males and females and were not associated with age. CONCLUSIONS: The PSQI is a reliable instrument to measure sleep quality in Mexican subjects.
Authors: Grigorios C Kotronoulas; Constantina N Papadopoulou; Anastasia Papapetrou; Elisabeth Patiraki Journal: Support Care Cancer Date: 2010-10-23 Impact factor: 3.603
Authors: M Pilar Martínez; Elena Miró; Ana I Sánchez; Carolina Díaz-Piedra; Rafael Cáliz; Johan W S Vlaeyen; Gualberto Buela-Casal Journal: J Behav Med Date: 2013-06-07
Authors: Carlos R Camara-Lemarroy; Mariana Hoyos; Beatriz E Ibarra-Yruegas; Marco A Díaz-Torres; Rolando De León Journal: Neurol Sci Date: 2017-07-25 Impact factor: 3.307
Authors: Oscar H Del Brutto; Robertino M Mera; Mauricio Zambrano; Victor J Del Brutto; Pablo R Castillo Journal: Environ Health Prev Med Date: 2014-01-30 Impact factor: 3.674
Authors: Carlos Jorquera-Aguilera; Guillermo Barahona-Fuentes; María José Pérez Peña; María Mercedes Yeomans Cabrera; Álvaro Huerta Ojeda Journal: Int J Environ Res Public Health Date: 2021-05-29 Impact factor: 3.390