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  • Title: Psychometric properties of the DASS-Depression scale among a Brazilian population with chronic pain.
    Author: Sardá J, Nicholas MK, Pimenta CA, Asghari A.
    Journal: J Psychosom Res; 2008 Jan; 64(1):25-31. PubMed ID: 18157996.
    Abstract:
    BACKGROUND: Depression is a common contributor to suffering and disability in people with chronic pain. However, the assessment of depression in this population has been hampered by the presence of a number of somatic symptoms that are shared between chronic pain, treatment side-effects and traditional concepts of depression. As a result, the use of depression measures that do not contain somatic items has been encouraged. OBJECTIVE: This study examined the psychometric properties of the Depression sub-scale of the Depression Anxiety and Stress Scales (DASS) in a Brazilian chronic pain patient population. METHOD: Data on a number of measures were collected from 348 participants attending pain facilities. RESULTS: Principal components and exploratory factor analyses indicated the presence of only one factor. Item analyses indicated adequate item-scale correlations. The Cronbach alpha was .96, which suggests an excellent internal consistency. CONCLUSION: The DASS-Depression scale has adequate psychometric properties and its further use with Brazilian chronic pain populations can now be supported.
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