Satisfaction with Life Scale (SLS-6): First validation study in Parkinson's disease population

Leire Ambrosio, Mari Carmen Portillo, Carmen Rodriguez-Blazquez, Juan Carlos Martínez-Castrillo, Mayela Rodriguez-Violante, Marcos Serrano-Dueñas, Víctor Campos-Arillo, Nelida Susana Garretto, Tomoko Arakaki, Mario Álvarez, Ivonne Pedroso-Ibáñez, Ana Carvajal, Pablo Martinez-Martin

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

20 Citas (Scopus)


Introduction To explore the psychometric attributes of a new Satisfaction with Life Scale (SLS-6) in a wide Spanish-speaking population with Parkinson's disease (PD). Methods This was an international, cross-sectional study. Several rater-based and patient-reported outcomes measures for evaluation of PD (e.g., Scales for Outcomes in Parkinson's Disease-Motor) and other constructs (e.g., Duke-UNC Functional Social Support Questionnaire, Scale for Living with Chronic Illness) were applied together with the SLS-6. Acceptability, scaling assumptions, reliability, precision, and construct validity were tested. Results The study included 324 patients from five countries, with age (mean ± standard deviation) 66.67 ± 10.68 years. None of the SLS-6 items had missing values and all acceptability parameters fulfilled the standard criteria. Scaling assumptions allowed the calculation of a summary index from items 2 to 6, complementary to the global evaluation (item 1). For these five items, Cronbach's alpha was 0.85; the corrected item–total correlation 0.53–0.73; inter-item correlation, 0.45–0.70, with an item homogeneity index of 0.55. The standard error of measurement, based on Cronbach's alpha for a single observation, was 3.48. SLS-6 correlations were moderate to strong (rs ≥ 0.35) with the patient-reported outcomes and weak to moderate with the rater-based assessments used in the study. The SLS-6 total score was significantly different according to PD severity levels established according to Hoehn and Yahr staging, Clinical Impression of Severity Index, and Patient-Based Global Impression of Severity scale. Conclusion The results suggest that SLS-6 is an easy, feasible, acceptable, consistent, precise and valid measure to evaluate satisfaction with life in PD patients.

Idioma originalInglés
Páginas (desde-hasta)52-57
Número de páginas6
PublicaciónParkinsonism and Related Disorders
EstadoPublicada - abr. 2016

Nota bibliográfica

Publisher Copyright:
© 2016 Elsevier Ltd


Profundice en los temas de investigación de 'Satisfaction with Life Scale (SLS-6): First validation study in Parkinson's disease population'. En conjunto forman una huella única.

Citar esto