Background and aims. Spirituality and religiosity (S/R) are universal aspects of human experience that have both benefits and costs on quality of life, well-being and health. Previous research with people with chronic pain supports the beneficial effects of R/S, as R/S are associated with lower pain and better psychological function. Brief, valid and reliable measures of S/R, and their translation and adaptation into different languages, are needed to confirm the role of S/R on the experience of chronic pain and to enable the cross-cultural comparison. This preliminary study sought to examine the psychometric properties of two brief measures of religiosity in a sample of Portuguese patients with chronic pain. Methods. A convenience sample of 69 participants completed the Portuguese versions of the Duke University Religion Index (DUREL-P) and of the Belief into Action Scale (BIAC-P), and measures of pain and subjective well-being. Results. Exploratory factor analysis supported a three-factor solution for the DUREL-P, and a two factor solution for the BIAC-P. The overall DUREL-P and the DUREL Intrinsic Religiosity subscale evidenced marginal to good reliability (.68<α<.91), while the overall BIAC-P and BIAC-P subscale evidenced good reliability (α=.81). DUREL Private Religious Activities subscale and overall BIAC-P were negatively associated with pain interference. Conclusions. These findings support the construct validity and reliability of DUREL-P and BIAC-P, and its use with for research and clinical purposes with Portuguese patients with chronic pain. Future research is warranted to further develop the Portuguese version of these measures and to confirm its concurrent validity.

TWO PORTUGUESE BRIEF VERSIONS OF RELIGIOSITY MEASURES APPLIED IN A SAMPLE OF PORTUGUESE PATIENTS WITH CHRONIC PAIN