Development and validation of the Questionnaire of Stressful Life Events (QSLE)

Anna Butjosa, Juana Gómez-Benito, Inez Myin-Germeys, Ana Barajas, Iris Baños, Judith Usall, Norma Grau, Luis Granell, Andrea Sola, Janina Carlson, Montserrat Dolz, Bernardo Sánchez, J. M. Haro, S. Araya, B. Arranz, M. Arteaga, R. Asensio, J. Autonell, I. Baños, M. BañuelosAna Barajas, M. Barceló, M. Blanc, M. Borrás, E. Busquets, A. Butjosa, J. Carlson, V. Carral, M. Castro, C. Corbacho, M. Coromina, I. Dachs, M. Dolz, M. Domenech, M. Elias, I. Espezel, E. Falo, A. Fargas, A. Foix, M. Fusté, M. Godrid, D. Gómez, O. González, L. Granell, L. Gumà, J. M. Haro, S. Herrera, E. Huerta, F. Lacasa

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)

Abstract

Stressful life events (SLEs) are important indicators prior to the onset of first-episode psychosis (FEP). Although there are well-validated interviews and self-reports for assessing SLE on proximate events, unfortunately there are no instruments to assess SLE covering an entire lifetime. This study includes detailed specific items of childhood, adolescence, and adulthood focused on the presence of SLE, emotional impact (stressfulness), and the age at which the event occurred. Our research describes 2 studies designed to develop and validate a new scale to assess SLE: the Questionnaire of Stressful Life Events (QSLE). In Study 1, an over-inclusive item pool was generated based on review of group of experts at Parc Sanitari Sant Joan de Déu and content validity was examined by an Expert Survey. The whole scale represents the content domain. In Study 2, item-level analyses revealed good distributional properties, intra-rater reliability, and convergent and discriminant validity. In the sensitivity and specificity analysis, 18 items had high relevance in the discriminability between patients with FEP and healthy controls. We note that there was an AUC of 0.676, indicating a good predictor. Using 7 as a cutoff to predict an individual as a patient would yield a sensitivity of 64.8% and a specificity of 65%. Overall, the QSLE displayed satisfactory psychometric characteristics in a Spanish population. These results suggest that QSLE gives us the opportunity to investigate childhood, adolescent, and adult life events by measuring the stress and age at the moment on a continuous scale.

Original languageEnglish
Pages (from-to)213-223
Number of pages11
JournalJournal of Psychiatric Research
Volume95
DOIs
Publication statusPublished - Dec 2017

Keywords

  • First-episode psychosis
  • Life events
  • Scale development
  • Validity

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