Adaptation and validation of the quality-of-life scale: Satisfaction with Life Domains Scale by Baker and Intagliata

ObjectivesThere are few quality-of-life instruments specifically for schizophrenia; thus, the objective of our study is to adapt and validate the Satisfaction with Life Domains Scale (SLDS) by Baker and Intagliata.MethodThis is a validation study in which the subjects were evaluated on 2 occasions (24-48 hours). The sample is composed of people with schizophrenia from 18 to 65 years old and who were seen in one of the following centers: Sant Joan de Déu-SSM, Hospital Clínic, Hospital de Mataró and Hospital Pere Mata. The SLDS was administered, along with Positive and Negative Syndrome Scale, the Clinical General Impression for Schizophrenia, Global Assessment of Function, Disability Assessment Scale—short version, Beck Cognitive Insight, and the Strauss and Carpenter Prognostic Scale. The Cronbach α test was carried out, and the intraclass correlation coefficient was used to assess test-retest reliability, along with Pearson correlations for discriminating validity.ResultsThe intraclass correlation coefficients oscillated between 0.51 and 0.83. The SLDS did correlate with any of the other instruments with the exception of the Positive and Negative Syndrome Scale general subscale and the Strauss and Carpenter prognostic scale.ConclusionsThe Spanish version of the SLDS was shown to be valid and reliable and provides a fast and specific measure for schizophrenia.