Construct Validity of the Brazilian Version of the Self-Efficacy for Appropriate Medication Adherence Scale.
OBJECTIVE
This study aimed to evaluate the reliability and the construct validity of the Brazilian version of the Self-Efficacy for Appropriate Medication Adherence Scale (SEAMS).


METHODS
One hundred forty-seven patients with coronary artery disease participated in the study. Reliability was estimated by composite reliability (CR). Convergent validity was estimated by the factor loading and average variance extracted (AVE). The discriminant validity was assessed by cross-factor loadings, comparing the square roots of AVEs by correlation coefficients between latent constructs and disattenuated correlation.


RESULTS
The values of CR of .88 and .99 for Factors 1 and 2, respectively, indicate internal consistency reliability. Values of AVE = 0.52 for Factor 1 and 0.69 for Factor 2 to the convergent validity of the model. Cross-factor loadings were found ≥.50 for all items of the scale in areas that were allocated in the original instrument, square roots of AVEs higher than the correlations between the constructs and desatenuada correlation (r = .83), suggesting discriminant validity fashion model.


CONCLUSIONS
Confirmatory factor analysis partially yielded the construct validity of the Brazilian version of the SEAMS.
State University of Campinas, Brazil.
Rafaela Batista dos Santos
RB
Pedrosa
Roberta Cunha Matheus
RC
Rodrigues
Henrique Ceretta
HC
Oliveira
Neusa Maria Costa
NM
Alexandre
D001938:Brazil; D003324:Coronary Artery Disease / Q000188:drug therapy* / Q000451:nursing / Q000523:psychology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D010349:Patient Compliance; D015203:Reproducibility of Results; D020377:Self Efficacy; D011795:Surveys and Questionnaires / Q000592:standards*