Volume 4, Issue 3 (August 2017)
Avicenna J Neuro Psycho Physiology 2017, 4(3): 95-102 |
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Mohammad Gholi Mezerji N, Naseri P, Omraninezhad Z, Shayan Z. The Reliability and Validity of the Persian Version of Pittsburgh Sleep Quality Index in Iranian People. Avicenna J Neuro Psycho Physiology 2017; 4 (3) :95-102
URL: http://ajnpp.umsha.ac.ir/article-1-93-en.html
URL: http://ajnpp.umsha.ac.ir/article-1-93-en.html
1- Department of Biostatistics and Epidemiology, School of Health, Students Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran.
2- Department of Biostatistics, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
3- Department of Biostatistics, School of Health, Arak University of Medical Sciences, Arak, Iran.
4- Trauma Research Center, Department of Biostatistics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran. ,shayanz@sums.ac.ir
2- Department of Biostatistics, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
3- Department of Biostatistics, School of Health, Arak University of Medical Sciences, Arak, Iran.
4- Trauma Research Center, Department of Biostatistics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran. ,
Abstract: (3976 Views)
Introduction: Sleep disturbances are a significant public health issue and such problems are associated with a number of psychiatric disorders. The Pittsburgh Sleep Quality Index (PSQI) is an effective instrument frequently used to evaluate sleep style and quality.
Objectives: The present study aimed to assess the reliability, validity, and factor structure of the Persian version of PSQI.
Materials and Methods: This cross-sectional study was conducted on 1115 citizens of Arak City, Iran aged 18-60 years. They were selected by stratified random sampling method from different parts of the city. The following aspects of the Persian version of PSQI were evaluated to assess its validity and reliability. To assess the validity of the content, the questionnaire was sent to a panel of 15 academic members consisting of experts in the fields of psychology and health education. The internal consistency of the PSQI questionnaire was evaluated by the Cronbach alpha coefficient and item-scale correlation. To investigate the factor structure of the PSQI, Exploratory Factor Analysis (EFA) was performed with a 2-factor solution and varimax rotation. The extraction of principal factors was performed after varimax orthogonal rotation and Kaiser’s criterion. At last, Confirmatory Factor Analysis (CFA) was applied to assess the reliability of the PSQI questionnaire. All analyses were performed in SPSS V. 16.0 and AMOS for Windows.
Results: The Persian version of PSQI was evaluated in the study with regard to its internal consistency and factor structure. The result showed excellent item content validity index (≥0.78) and excellent scale content validity index (≥0.90). The result of the Cronbach alpha coefficient was 0.65. The factors of perceived sleep quality and sleep efficiency were extracted by means of factor analysis and these two factors explained 51.75% of the total variance. Confirmatory factor analysis results show the model’s satisfactory fitting based on adequacy criteria goodness of fit index, goodness of fit index adjusted for degrees of freedom, root mean square error of approximation, and comparative fit index. The non-normed fit index was close to its reference value of 0.90.
Conclusion: In general, findings suggest that the Persian version of PSQI displayed satisfactory validity and reliability to measure the quality of sleep of Iranian people, at least citizens of Arak City, Iran.
Objectives: The present study aimed to assess the reliability, validity, and factor structure of the Persian version of PSQI.
Materials and Methods: This cross-sectional study was conducted on 1115 citizens of Arak City, Iran aged 18-60 years. They were selected by stratified random sampling method from different parts of the city. The following aspects of the Persian version of PSQI were evaluated to assess its validity and reliability. To assess the validity of the content, the questionnaire was sent to a panel of 15 academic members consisting of experts in the fields of psychology and health education. The internal consistency of the PSQI questionnaire was evaluated by the Cronbach alpha coefficient and item-scale correlation. To investigate the factor structure of the PSQI, Exploratory Factor Analysis (EFA) was performed with a 2-factor solution and varimax rotation. The extraction of principal factors was performed after varimax orthogonal rotation and Kaiser’s criterion. At last, Confirmatory Factor Analysis (CFA) was applied to assess the reliability of the PSQI questionnaire. All analyses were performed in SPSS V. 16.0 and AMOS for Windows.
Results: The Persian version of PSQI was evaluated in the study with regard to its internal consistency and factor structure. The result showed excellent item content validity index (≥0.78) and excellent scale content validity index (≥0.90). The result of the Cronbach alpha coefficient was 0.65. The factors of perceived sleep quality and sleep efficiency were extracted by means of factor analysis and these two factors explained 51.75% of the total variance. Confirmatory factor analysis results show the model’s satisfactory fitting based on adequacy criteria goodness of fit index, goodness of fit index adjusted for degrees of freedom, root mean square error of approximation, and comparative fit index. The non-normed fit index was close to its reference value of 0.90.
Conclusion: In general, findings suggest that the Persian version of PSQI displayed satisfactory validity and reliability to measure the quality of sleep of Iranian people, at least citizens of Arak City, Iran.
Article Type: Letter to editor |
Subject:
General
Received: 2016/12/10 | Accepted: 2017/04/15 | Published: 2017/08/1
Received: 2016/12/10 | Accepted: 2017/04/15 | Published: 2017/08/1
References
1. Altevogt BM, Colten HR. Sleep disorders and sleep deprivation: An unmet public health problem. Washington, DC.: National Academies Press; 2006. [PMCID]
2. Buysse DJ, Reynolds III CF, Monk TH, Berman SR, Kupfer DJ. The Pittsburgh sleep quality index: A new instrument for psychiatric practice and research. Psychiatry Research. 1989; 28(2):193-213. [DOI:10.1016/0165-1781(89)90047-4] [DOI:10.1016/0165-1781(89)90047-4]
3. Grandner MA, Kripke DF, Yoon IY, Youngstedt SD. Criterion validity of the Pittsburgh sleep quality index: Investigation in a non-clinical sample. Sleep and Biological Rhythms. 2006; 4(2):129-36. [DOI:10.1111/j.1479-8425.2006.00207.x] [PMID] [PMCID] [DOI:10.1111/j.1479-8425.2006.00207.x]
4. Monazzam MR, Hosseini M, Matin LF, Aghaei HA, Khosroabadi H, Hesami A. Sleep quality and general health status of employees exposed to extremely low frequency magnetic fields in a petrochemical complex. Journal of Environmental Health Science and Engineering. 2014; 12(1):78. [DOI:10.1186/2052-336X-12-78] [PMID] [PMCID] [DOI:10.1186/2052-336X-12-78]
5. Adib Hajbaghery M, Izadi Avanji F, Akbari H. Quality of sleep and its related risk factors in hospitalized older patients in Kashan's hospitals, Iran 2009. Iranian Journal of Nursing and Midwifery Research. 2012; 17(6):414-20. [PMID] [PMCID] [PMID] [PMCID]
6. Ait Aoudia M, Levy PP, Bui E, Insana S, De Fouchier C, Germain A, et al. Validation of the French version of the Pittsburgh sleep quality index addendum for post traumatic stress disorder. European Journal of Psychotraumatology. 2013; 4(1):19298. [DOI:10.3402/ejpt.v4i0.19298] [PMID] [PMCID] [DOI:10.3402/ejpt.v4i0.19298]
7. Doi Y, Minowa M, Uchiyama M, Okawa M, Kim K, Shibui K, et al. Psychometric assessment of subjective sleep quality using the Japanese version of the Pittsburgh Sleep Quality Index (PSQI-J) in psychiatric disordered and control subjects. Psychiatry Research. 2000; 97(2-3):165-72. [DOI:10.1016/S0165-1781(00)00232-8] [DOI:10.1016/S0165-1781(00)00232-8]
8. Knutson KL, Rathouz PJ, Yan LL, Liu K, Lauderdale DS. Stability of the Pittsburgh sleep quality index and the Epworth sleepiness questionnaires over 1 year in early middle-aged adults: The CARDIA study. Sleep. 2006; 29(11):1503-6. [DOI:10.1093/sleep/29.11.1503] [PMID] [DOI:10.1093/sleep/29.11.1503]
9. Kotronoulas GC, Papadopoulou CN, Papapetrou A, Patiraki E. Psychometric evaluation and feasibility of the Greek Pittsburgh Sleep Quality Index (GR-PSQI) in patients with cancer receiving chemotherapy. Supportive Care in Cancer. 2011; 19(11):1831-40. [DOI:10.1007/s00520-010-1025-4] [PMID] [DOI:10.1007/s00520-010-1025-4]
10. Cole JC, Motivala SJ, Buysse DJ, Oxman MN, Levin MJ, Irwin MR. Validation of a 3-factor scoring model for the Pittsburgh sleep quality index in older adults. Sleep. 2006; 29(1):112-6. [DOI:10.1093/sleep/29.1.112] [PMID] [DOI:10.1093/sleep/29.1.112]
11. Aloba OO, Adewuya AO, Ola BA, Mapayi BM. Validity of the Pittsburgh Sleep Quality Index (PSQI) among Nigerian university students. Sleep Medicine. 2007; 8(3):266-70. [DOI:10.1016/j.sleep.2006.08.003] [PMID] [DOI:10.1016/j.sleep.2006.08.003]
12. Burkhalter H, Sereika SM, Engberg S, Wirz Justice A, Steiger J, De Geest S. Structure validity of the Pittsburgh sleep quality index in renal transplant recipients: A confirmatory factor analysis. Sleep and Biological Rhythms. 2010; 8(4):274-81. [DOI:10.1111/j.1479-8425.2010.00473.x] [DOI:10.1111/j.1479-8425.2010.00473.x]
13. Mariman A, Vogelaers D, Hanoulle I, Delesie L, Tobback E, Pevernagie D. Validation of the three-factor model of the PSQI in a large sample of Chronic Fatigue Syndrome (CFS) patients. Journal of Psychosomatic Research. 2012; 72(2):111-3. [DOI:10.1016/j.jpsychores.2011.11.004] [PMID] [DOI:10.1016/j.jpsychores.2011.11.004]
14. Tomfohr LM, Schweizer CA, Dimsdale JE, Loredo JS. Psychometric characteristics of the Pittsburgh sleep quality index in English speaking non-hispanic whites and English and Spanish speaking Hispanics of Mexican descent. Journal of Clinical Sleep Medicine. 2013; 9(1):61-6. [DOI:10.5664/jcsm.2342] [DOI:10.5664/jcsm.2342]
15. Otte JL, Rand KL, Carpenter JS, Russell KM, Champion VL. Factor analysis of the Pittsburgh sleep quality index in breast cancer survivors. Journal of Pain and Symptom Management. 2013; 45(3):620-7. [DOI:10.1016/j.jpainsymman.2012.03.008] [PMID] [PMCID] [DOI:10.1016/j.jpainsymman.2012.03.008]
16. Polit DF, Beck CT. The content validity index: Are you sure you know what's being reported? Critique and recommendations. Research in Nursing & Health. 2006; 29(5):489-97. [DOI:10.1002/nur.20147] [PMID] [DOI:10.1002/nur.20147]
17. Costa ALS, Silva RMD, Mussi FC, Serrano PM, Graziano EDS, Batista KDM. Short version of the "instrument for assessment of stress in nursing students" in the Brazilian reality. Revista Latino-Americana De Enfermagem. 2017; 25:e2976. [DOI:10.1590/1518-8345.2071.2976] [DOI:10.1590/1518-8345.2071.2976]
18. Yong AG, Pearce S. A beginner's guide to factor analysis: Focusing on exploratory factor analysis. Tutorials in Quantitative Methods for Psychology. 2013; 9(2):79-94. [DOI:10.20982/tqmp.09.2.p079] [DOI:10.20982/tqmp.09.2.p079]
19. Kline P. An easy guide to factor analysis. Abingdon: Routledge; 2014. [DOI:10.4324/9781315788135] [DOI:10.4324/9781315788135]
20. Hair JF, Black WC, Babin BJ, Anderson RE, Tatham RL. [Análise multivariada de dados (Portuguese)]. Porto Alegre: Bookman editora; 2009. [PMCID]
21. Nazifi M, Mokarami H, Akbaritabar A, Kalte HO, Rahi A. Psychometric properties of the Persian translation of Pittsburgh sleep quality index. Health Scope. 2014; 3(2):e15547. [DOI:10.17795/jhealthscope-15547] [DOI:10.17795/jhealthscope-15547]
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