Alvarenga, Willyane Andrade deNascimento, Lucila CastanheiraSantos, Claudia Benedita dosLeite, Ana Carolina Andrade BiaggiMühlan, HolgerSchmidt, SilkeBullinger, MonikaCarvalho, Emília Campos deBredle, JasonArnold, BenjaminCoelho, Robson de CastroVieira, Margarida2019-09-042019-09-042019de Alvarenga, W. A., Nascimento, L. C., dos Santos, C. B., Leite, A. C. A. B., Mühlan, H., Schmidt, S., … Vieira, M. (2019). Measuring Spiritual Well-Being in Brazilian Adolescents with Chronic Illness Using the FACIT-Sp-12: Age Adaptation of the Self-Report Version, Development of the Parental-Report Version, and Validation. Journal of Religion and Health. https://doi.org/10.1007/s10943-019-00901-y0022-4197http://hdl.handle.net/10400.14/28167Spiritual well-being is a major issue in health care, but instruments for measuring this construct in adolescents are lacking. This study adapted the 12-item Functional Assessment of Chronic Illness Therapy-Spiritual Well-being Scale (FACIT-Sp-12) for use with Brazilian adolescents with chronic diseases and developed a parental observer-rated version, using an expert panel, back-translation, and cognitive interviews with 72 participants. The psychometric properties of both versions were verified with two- and three-factor models by testing with 212 participants. The self- and parental-reported versions showed face validity, content validity, and acceptable levels of internal consistency for the overall scale and the two-factor model. The convergent validity was satisfactory for most items in both two- and three-factor models, but there was a lack of discrimination in the three-factor model using multitrait–multimethod analysis. This study presents the first instrument to assess the spiritual well-being of adolescents from their point of view and to allow their parents to serve as evaluators. However, we recommend further psychometric testing of the self- and parental-report scales to assess spiritual well-being in adolescents with chronic diseases in Brazil.engValidation studiesPsychometricsAdolescentsParentsProxySpiritualitySpiritual well-beingjournal article10.1007/s10943-019-00901-y1573-65718507145253731446605000495395100022