Validação e calibração da versão brasileira do domínio satisfação com a participação social do Patient-Reported Outcomes Measurement Information System - PROMIS® - (versão 1.0)

Abstract

Introduction: The impact of chronic diseases and their treatments on Health-Related Quality of Life (HRQoL) can be measured by the degree of satisfaction with social participation. Efforts are therefore being made to develop and make available instruments for this purpose. Purpose: Validate and calibrate the Brazilian version of the domain Satisfaction with Social Participation (SATPS) and its item banks Satisfaction with participation in Social Roles (SATPSRP-14-items) and Discretionary Social Activities (SATPDSA-12-items). Method: Satisfaction with Participation item banks were administered to a sample of 606 Brazilian adults, selected by convenience. Several statistical criteria were estimated for the preliminary data analysis, the assumptions of the item response theory (IRT) and the psychometric properties of validity (tests of hypothesis and identification of the structural model) and reliability (reproducibility, internal consistency, measurement error and ancillary indices of the bifator model). IRT based analysis (Samejima Graded-Response-Model and Likelihood-based chi-square statistics (S-X2) were applied to calibrate the items across the latent construct and to assess model fit, respectively. Analyzes of the Categorical Response Curves (CRC) and the Test Information Curve (CIT) were realized to show the performance of the items in relation to the latent trait level of the respondent. A hybrid model (Ordinary Logistic Regression, OLR, associated with TRI scores) was applied to detect possible presence of Differential Functioning of Items (DIF) for the English and Portuguese language. Results: Respondents were predominantly women (69.3%) and middle-aged (mean 49.2 years old) with a range from 18 to 90 years. Most of them (37.3%) had less than 9 years of literacy. The self-reported clinical conditions most frequently related were hypertension, chronic low back pain and Diabetes mellitus. The discrimination parameter ranged from 1.54 to 2.94 and the construct coverage from -2.25 to 2.24. Three items, one related with the SATPSRP and two with the SATPDSA, did not fit to GRM. No item presented impactful language DIF. Conclusion: The Brazilian version of the Item bank Satisfaction with Social Participation was successfully calibrated and presented an adequate validity and reliability for the SATPSRP bank, while the SATPDSA bank needs to be restructured for its application as an isolated scale in the Brazilian population.