Reassessment of the Psychometric Characteristics and Factor Structure of the 'Perceived Stress Questionnaire' (PSQ): Analysis in a Sample of Dental Students

Reassessment of the Psychometric Characteristics and Factor Structure of the 'Perceived Stress Questionnaire' (PSQ): Analysis in a Sample of Dental Students

Author Montero-Marin, Jesus Google Scholar
Demarzo, Marcelo Marcos Piva Autor UNIFESP Google Scholar
Pereira, Joao Paulo Google Scholar
Olea, Marina Google Scholar
Garcia-Campayo, Javier Google Scholar
Institution Univ Zaragoza
Universidade Federal de São Paulo (UNIFESP)
Inst Super Maia
Miguel Servet Univ Hosp
Primary Care Prevent & Hlth Promot Res Network Re
Abstract Background: the training to become a dentist can create psychological distress. the present study evaluates the structure of the 'Perceived Stress Questionnaire' (PSQ), its internal consistency model and interrelatedness with burnout, anxiety, depression and resilience among dental students.Methods: the study employed a cross-sectional design. A sample of Spanish dental students (n = 314) completed the PSQ, the 'Goldberg Anxiety and Depression Scale' (GADS), 'Connor-Davidson Resilience Scale' (10-item CD-RISC) and 'Maslach Burnout Inventory-Student Survey' (MBI-SS). the structure was estimated using Parallel Analysis from polychoric correlations. Unweighted Least Squares was the method for factor extraction, using the Item Response Theory to evaluate the discriminative power of items. Internal consistency was assessed by squaring the correlation between the latent true variable and the observed variable. the relationships between the PSQ and the other constructs were analysed using Spearman's coefficient.Results: the results showed a PSQ structure through two sub-factors ('frustration' and 'tenseness') with regard to one general factor ('perceived stress'). Items that did not satisfy discriminative capacity were rejected. the model fit were acceptable (GFI = 0.98; RSMR = 0.06; AGFI = 0.98; NFI = 0.98; RFI = 0.98). All the factors showed adequate internal consistency as measured by the congeneric model (>= 0.91). High and significant associations were observed between perceived stress and burnout, anxiety, depression and resilience.Conclusions: the PSQ showed a hierarchical bi-factor structure among Spanish dental students. Using the questionnaire as a uni-dimensional scale may be useful in perceived stress level discrimination, while the sub-factors could help us to refine perceived stress analysis and improve therapeutic processes.
Language English
Sponsor Research Network on Preventative Activities and Health Promotion
Aragon Health Sciences Institute
Faculty of Health and Sports (University of Zaragoza)
Faculty of Medicine and Dentistry (University of Santiago de Compostela)
Grant number Research Network on Preventative Activities and Health Promotion: RD06/0018/0017
Date 2014-01-23
Published in Plos One. San Francisco: Public Library Science, v. 9, n. 1, 9 p., 2014.
ISSN 1932-6203 (Sherpa/Romeo, impact factor)
Publisher Public Library Science
Extent 9
Origin http://dx.doi.org/10.1371/journal.pone.0087071
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000330288000191
URI http://repositorio.unifesp.br/handle/11600/37325

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