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Differential Relationships Between Diabetes Knowledge Scales and Diabetes Outcomes. Diabetes Educ 2017 08;43(4):360-366



Pubmed ID




Scopus ID

2-s2.0-85025461784   1 Citation


Background Diabetes affects more than 29 million people in the US and requires daily self-management in addition to knowledge of the disease. Three knowledge assessments used are the Michigan Brief Diabetes Knowledge Test (DKT), Starr County Diabetes Knowledge Questionnaire (DKQ), and Kaiser DISTANCE Survey (DISTANCE). Purpose The purpose of the study was to test the discriminate validity of 3 diabetes knowledge scales and determine which is best associated with diabetes self-care and glycemic control. Methods Three hundred sixty-one adults with type 2 diabetes were recruited from primary care clinics. Four analyses were conducted to investigate the validity and relationships of the scale: alpha statistic to test internal validity, factor analysis to determine how much of the variance was explained, Pearson's correlation between the 3 scales, and Pearson's correlation between each scale, self-care, and outcomes. Results The DKQ had an alpha of 0.75, the DKT had an alpha of 0.49, and DISTANCE had an alpha of 0.36. The DKQ was significantly correlated with glycemic control. The DKT scale was significantly associated with general diet, the DISTANCE survey was significantly associated with exercise, and both DKT and DISTANCE were significantly associated with foot care. Conclusion Correlations among the 3 scales were modest, suggesting the scales are not measuring the same underlying construct. These findings indicate that researchers should carefully select scales appropriate for study goals or to appropriately capture the information being sought to inform practice.

Author List

Dawson AZ, Walker RJ, Egede LE


Aprill Z. Dawson PhD, MPH Assistant Professor in the Medicine department at Medical College of Wisconsin
Leonard E. Egede MD Center Director, Chief, Professor in the Medicine department at Medical College of Wisconsin
Rebekah Walker PhD Assistant Professor in the Medicine department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Blood Glucose
Diabetes Mellitus
Factor Analysis, Statistical
Health Knowledge, Attitudes, Practice
Middle Aged
Reproducibility of Results
Surveys and Questionnaires
jenkins-FCD Prod-409 d1e206b0be345926047b0d9c353c78a4cce4058b