Psychometric Evaluation of the Brazilian Version of the "Sexually Transmitted Disease Knowledge Questionnaire"

This study evaluated the psychometric properties of the Brazilian version of the Sexually Transmitted Disease Knowledge Questionnaire (STD-KQ). A convenience sample of 429 students of a Brazilian public university participated in the study. Exploratory Factor Analysis suggested one factor solution (variance explained = 61.1%, eigenvalue = 7.2), confirmed by the confirmatory analysis (Root Mean Square Error of Approximation = 0.04; Comparative Fit Index = 0.91; Tucker-Lewis Index = 0.90; Standardized Root Mean Square Residual = 0.05). Five items feature charges less than 0.30 and wer eliminated. The instrument demonstrated internal consistency (Composite reliability = 0.97; Cronbach's alpha = 0.83) and temporal stability (Pearson correlation = 0.86; kappa = 0.16) over a brief period. The knowledge significantly varies by age, sex and course of study. In conclusion, this study highlights the satisfactory psychometric proprieties of the Brazilian version of STD-KQ in university students.