Structural analysis and reliability of the Perceived Stress Scale in nursing professionals from Peru

Abstract

Objective: The objective was to provide psychometric evidence of the 14-item and 10-item version of the Perceived Stress Scale in nursing professionals from Peru.

Method: Data on 2848 professionals (92.275% women) between 23 and 69 years old (M = 21.876; SD = 10.763) was extracted from ENSUSALUD 2015. An exploratory structural equation modelling (ESEM) was applied with Mplus 7.0 software to analyse several measurement models in the PSS: unidimensional, bidimensional, models with method factor, and bifactor. Finally, the reliability was analysed.

Results: The two-factor structure obtained adequate fit indices, and acceptable factorial loadings (>.50), while the unidimensional model has poor statistical support. The construct and score reliability was also adequate.

Conclusion: The two-factor model of the PSS-10 and PSS-14 presents adequate psychometric properties to expand its use to empirical research.

Keywords: Análisis factorial; Enfermería; Escala de Estrés Percibido; Estrés; Factor analysis; Fiabilidad; Nursing; Perceived Stress Scale; Reliability; Stress; Validez; Validity.