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[Adaptation and validation of a test on knowledge about diabetes mellitus]
J M Campo1, M E Vargas, T Martínez-Terrer
1Unidad Docente de Medicina Familiar y Comunitaria, Hospital Clínico Universitario de Zaragoza.
Objective:
To adapt and validate a Spanish language medium test, of theoretical general knowledge of diabetes mellitus (questionnaire from the University of Michigan). To determine the validity of the concurrent and discriminatory content and establish reliability.
Design:
The study was observational. Validity was verified prior to data collection. To analyse the concurrent and discriminatory validity, a questionnaire was used in personal interview with the patients, and the degree of knowledge evaluated on certain variables.
Setting:
Hospital outpatient endocrinology consultations.
Patients:
167 diabetic patients were chosen at random, from the outpatient visits. 14 patients who had developed hearing, or language problems, or who had problems of a psychological nature, were excluded. Only 1 patient refused to answer the questionnaire.
Main Measurements And Results:
Validity of the content was confirmed after careful analysis of the questions on the questionnaire by medical specialists in endocrinology. It was found that the test had adequate concurrence (p less than 0.01) when the average general knowledge levels of certain group of patients are compared. It also had acceptable discriminatory validity (r = 0.56: p less than 0.0001) and reliability (alpha: 0.84; p less than 0.45).
Conclusions:
Adaptation and validation has been obtained for a test of theoretical general knowledge on diabetes mellitus, and the test was found to be applicable to the population under study.