Author/Authors :
Shamsipour, Mansour Department of Research Methodology and Data Analysis - Institute for Environmental Research - Tehran University of Medical Sciences, Tehran, Iran , Akhlaghi, Ali Asghar Department of Epidemiology and Reproductive Health - Reproductive Epidemiology Research Center - Royan Institute for Reproductive Biomedicine - Academic Center for Education - Culture and Research, Tehran, Iran , Vesali, Samira Department of Epidemiology and Reproductive Health - Reproductive Epidemiology Research Center - Royan Institute for Reproductive Biomedicine - Academic Center for Education - Culture and Research, Tehran, Iran , Khatooni, Elham Department of Epidemiology and Biostatistics - School of Public Health - Tehran University of Medical Sciences, Tehran, Iran , Najafi, Arezu Occupational Sleep Research Center - Baharloo Hospital - Tehran University of Medical Sciences, Tehran, Iran , Navid, Behnaz Department of Epidemiology and Reproductive Health - Reproductive Epidemiology Research Center - Royan Institute for Reproductive Biomedicine - Academic Center for Education - Culture and Research, Tehran, Iran , Akhlaghi, Elaheh Department of Epidemiology and Reproductive Health - Reproductive Epidemiology Research Center - Royan Institute for Reproductive Biomedicine - Academic Center for Education - Culture and Research, Tehran, Iran , Marzban, Hooria Department of Epidemiology and Reproductive Health - Reproductive Epidemiology Research Center - Royan Institute for Reproductive Biomedicine - Academic Center for Education - Culture and Research, Tehran, Iran , Ezabadi, Zahra Department of Epidemiology and Reproductive Health - Reproductive Epidemiology Research Center - Royan Institute for Reproductive Biomedicine - Academic Center for Education - Culture and Research, Tehran, Iran , Omani-Samani, Reza Department of Epidemiology and Reproductive Health - Reproductive Epidemiology Research Center - Royan Institute for Reproductive Biomedicine - Academic Center for Education - Culture and Research, Tehran, Iran
Abstract :
Background and Objective: People that undergo assisted infertility treatments experience more sleep problems. Alt-hough Pittsburgh Sleep Quality Index (PSQI) frequently has been used as a sleep quality assessment scale in different clinical and non-clinical settings, different sample characteristics may account for different structures. The current study aimed to evaluate the factor structure of PSQI among women seeking infertility treatment in Iran.
Materials and Methods: Using a convenience sampling method, 157 infertile women or women whose husbands had infertility problems were included in a cross-sectional study in Royan Institute, a main referral infertility center in Teh-ran, Iran. The factor structure of PSQI was evaluated through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA).
Results: The Cronbach’s alpha coefficient for PSQI was 0.65. A two-factor model was extracted by EFA; 56% of the total variance was accounted for by this model. The results of CFA indicated that extracted model obtained acceptable fit statistics [comparative fit index (CFI) = 0.942, standardized root mean square residual (SRMR) = 0.042, root mean square error of approximation (RMSEA) = 0.128, χ2 = 19.8, degree of freedom (df) = 12, P = 0.071] compared to other original single-factor or 3-factor models.
Conclusion: Our results revealed the limited usefulness of single-factor structure of PSQI. A two-factor model of Per-sian version of PSQI should be used to assess sleep problems among women seeking assisted infertility treatments.
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Keywords :
Sleep , Factor analysis , Assisted reproductive techniques , Infertility
