Reliability and Validity of a Carbohydrate-Counting Knowledge Questionnaire for Young Australians With Type 1 Diabetes

Jacqueline Beal, Shelley Farrent, Lavinia Farndale, Lucinda Bell

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Objective: To test the reliability and validity of a carbohydrate-counting knowledge questionnaire in young Australians with type 1 diabetes mellitus (T1DM).

Methods: Children or young adults (<20 years) with T1DM, or their parents, completed the 72-item Australian PedCarbQuiz (AusPCQ), adapted from the American PedCarbQuiz, and an expert assessment of carbohydrate-counting knowledge. Responses were scored and summed (0–72, higher scores = greater knowledge). Internal reliability was assessed using Cronbach α, and relative validity using Spearman correlations (with HbA1c) and Bland-Altman analysis (with the expert assessment).

Results: Australian PedCarbQuiz reliability (n = 44, mean score = 59.7 ± 5.6) was acceptable (α = 0.83). There was a lack of agreement (mean bias = 10.7, P = 0.008) and significant proportional bias between AusPCQ scores and expert assessments (β = −0.73 [95% confidence interval, −1.82 to −0.79]; P < 0.001).

Conclusions and Implications: The AusPCQ was shown to be reliable but not valid in a small sample. Testing in a larger sample is warranted.

Original languageEnglish
Pages (from-to)614-618
Number of pages5
JournalJournal of Nutrition Education and Behavior
Volume53
Issue number7
DOIs
Publication statusPublished - Jul 2021

Keywords

  • adolescent
  • child
  • diabetes
  • surveys and questionnaires
  • validation study

Fingerprint

Dive into the research topics of 'Reliability and Validity of a Carbohydrate-Counting Knowledge Questionnaire for Young Australians With Type 1 Diabetes'. Together they form a unique fingerprint.

Cite this