ArticleSleep medicine: X2021
Components of Pittsburgh Sleep Quality Index in Iranian adult population: an item response theory model.
Article in Sleep medicine: X, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 25 citations in OpenAlex.
- Determining the relationship between sleep quality and reproductive health issues in fertile and infertile men and women: A cross-sectional study.Sleep medicine: X · 2025Article
- Sleep quality in Spanish adults: an age- and sex-stratified cross-sectional study.Scientific reports · 2025Observational
- Factors related to sleep quality in the adult population of Shahroud; Comparison of adjusted distributional and multivariable logistic regression analysis.Global epidemiology · 2025Article
- The Therapeutic Effect of High-definition 1-Hz Transcranial Alternating Current Stimulation in PTSD: A Randomized Controlled Trial.Clinical psychopharmacology and neuroscience : the official scientific journal of the Korean College of Neuropsychopharmacology · 2025Article
- Sleep quality and sleep hygiene among medical undergraduates in Himachal Pradesh (North India): A questionnaire-based study.Journal of family medicine and primary care · 2025Article
- Associations between essential trace elements and sleep quality in Iranian adults based on the Pittsburgh Sleep Quality Index.Scientific reports · 2025Article
- Investigating the relationship between shift work schedule and blood and metabolic parameters: a 10-years retrospective cohort study.Scientific reports · 2024Article
- Investigating sleep quality and sleep hygiene awareness among Chinese adults: an association and network analysis study.Sleep & breathing = Schlaf & Atmung · 2023Article
- The relationship between the intake of branched-chain and aromatic amino acids and individuals' sleep quality based on body mass index, gender, and age.Journal of health, population, and nutrition · 2023Article
- The Effect of Healthy Mental Lifestyle Package On Sleep Quality, Mental Health, and Lifestyle of Substance Users.Advanced biomedical research · 2023Article
- The interaction of occupational stress, mental health, and cytokine levels on sleep in Xinjiang oil workers: A cross-sectional study.Frontiers in psychiatry · 2022Article
- Animal welfare knowledge, attitudes, and practices among livestock holders in Ethiopia.Frontiers in veterinary science · 2022Article
- Independent and joint effects of sleep duration and sleep quality on suboptimal self-rated health in medical students: A cross-sectional study.Frontiers in public health · 2022Article
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Authors and funding
4 authors at 3 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
OBJECTIVE/
backgroundThere have been conducted few studies in Iran on the quality of sleep in the general population. This study aimed to use the item response theory (IRT) model to examine the accuracy of the seven components of the Pittsburgh Sleep Quality Index (PSQI) and to provide an appropriate cut-off point for population-based studies.
methodsThis study was performed using the data of the second phase of the Shahroud Eye Cohort Study (ShECS) in 2014. The sleep quality of 4710 participants was measured through PSQI. Using an IRT model, the seven components of the index are considered as indicators and sleep quality as the latent variable in the measurement model. This model supposed that there is only one hidden component to explain the respondent's behavior to a number of items.
resultsResults of analyzing different components of PSQI showed that component 6 (using sleep medication) and 7 (daytime dysfunction disorder) had the lowest values of discrimination parameter and component 4 (habitual sleep efficiency) and 1 (sleep quality) had the highest value of discrimination parameter. Persons with an expected sleep quality score of less than or equal to 6.5 will be defined as good sleep quality pattern.
conclusionsSince discrimination values for components 6 and 7 are less than the values for other components, the use of the standardized latent scores is emphasized for assessing the quality of sleep in the population.
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