Abstract
This paper aims to analyze the measurement equivalence aspects (internal consistency and interrater reliability) of a Brazilian version of Martin-Bayarre-Grau (MBG) adherence questionnaire as part of its cross-cultural adaptation. Item-total correlation and Cronbach's alpha coefficients were used as internal consistency estimates. Stability was evaluated through test and retest comparison and expressed through intraclass correlation coefficient (ICC) and kappa with quadratic weighting. ICC for the overall scale was 0.81, indicating an almost perfect agreement. However, some cases of poor and slight agreements were found while analyzing individual items. The translated version of the MBG questionnaire showed good homogeneity (alpha 0.78), higher than cutoff points suggested in the literature. The scale has proved capable of measuring the level of adherence to treatment in hypertensive and/or diabetic patients in a reliable way.
Highlights
Poor adherence to chronic treatment affects the health of individuals and has economic consequences to health systems, which cover populations with high prevalence of chronic diseases (WHO, 2003).Among methods applied to investigate adherence, patient interviews are widely used because they are easy to apply and have low cost, in spite of their limitations (Osterberg, Blaschke, 2005; Garfield et al, 2011; Nguyen, La Caze, Cottrell, 2014)
This paper aims to analyze measurement equivalence aspects of a Brazilian version of Martín-Bayarre-Grau (MBG)
It was lower than that of the original scale (0.89) (Alfonso, Vea, Ábalo, 2008), it was compatible with the internal consistency level usually found and deemed appropriate for other measures (>0.7) (Nguyen, La Caze, Cottrell, 2014; Osterberg, Blaschke, 2005)
Summary
Poor adherence to chronic treatment affects the health of individuals and has economic consequences to health systems, which cover populations with high prevalence of chronic diseases (WHO, 2003). Among methods applied to investigate adherence, patient interviews are widely used because they are easy to apply and have low cost, in spite of their limitations (Osterberg, Blaschke, 2005; Garfield et al, 2011; Nguyen, La Caze, Cottrell, 2014). If one opts to translate a questionnaire, a formal procedure of cross-cultural adaptation should be followed This process culminates with the study of psychometric properties of the adapted scale (Reichenheim, Moraes, 2007). In this final stage of adaptation, measurement equivalence between versions is analyzed through
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
