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Validation of the Revised Brief Diabetes Knowledge Test (DKT2).

James T Fitzgerald1, Martha M Funnell2, Robert M Anderson2

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The revised Diabetes Knowledge Test 2 (DKT2) shows reliability and validity when combining two diverse samples. This updated test effectively assesses general diabetes knowledge and self-care skills.

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Area of Science:

  • Endocrinology
  • Medical Education
  • Health Assessment

Background:

  • Diabetes management requires up-to-date patient knowledge.
  • Existing diabetes knowledge tests may not reflect current guidelines.
  • A reliable and valid assessment tool is crucial for effective diabetes education.

Purpose of the Study:

  • To evaluate the reliability and validity of the revised Diabetes Knowledge Test (DKT2).
  • To confirm the updated DKT2 aligns with current diabetes care and education standards.
  • To assess the DKT2's two components: a general knowledge test and an insulin use subscale.

Main Methods:

  • Two distinct samples (n=101 online, n=89 from a diabetes registry) were utilized.
  • Reliability was assessed using Cronbach's alpha.
  • Validity was examined through comparisons based on diabetes type, medication use, education level, and diabetes duration.

Main Results:

  • Reliability coefficients for the combined sample were .77 for the general test and .84 for the insulin subscale.
  • Validity comparisons indicated the DKT2 demonstrated validity when samples were combined, despite demographic differences.
  • Demographic variations between samples influenced individual reliability and validity findings.

Conclusions:

  • Despite sample-specific inconsistencies, combined analysis supports the DKT2's reliability and validity.
  • The DKT2 is confirmed as a practical, cost-effective tool for assessing diabetes knowledge.
  • The updated test is suitable for evaluating general diabetes knowledge and self-care practices.