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A New Tool for Nutrition App Quality Evaluation (AQEL): Development, Validation, and Reliability Testing.

Kristen Nicole DiFilippo1, Wenhao Huang2, Karen M Chapman-Novakofski3

  • 1Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States.

JMIR Mhealth and Uhealth
|October 29, 2017
PubMed
Summary

The App Quality Evaluation (AQEL) tool is a validated and reliable instrument for assessing nutrition apps. This tool helps clinicians and researchers evaluate app quality for nutritional counseling and interventions.

Keywords:
diet, food, and nutritiondietitiansevaluationhealth educationmobile apps

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Area of Science:

  • Nutrition informatics
  • Digital health evaluation
  • Mobile health interventions

Background:

  • Mobile apps are increasingly used for nutrition interventions.
  • Evaluating the quality of these apps is essential for their integration into clinical practice.

Purpose of the Study:

  • To develop and validate the App Quality Evaluation (AQEL) tool.
  • To test the reliability of the AQEL tool for assessing educational quality and technical functionality of nutrition apps.

Main Methods:

  • Adapted items from website evaluations and added app-specific features for initial 79 items.
  • Expert panels (nutrition, technology, users) validated items; nutrition experts refined clarity.
  • Principal component analysis reduced items to 5 factors; reliability testing included internal consistency, split-half, test-retest, and interrater reliability (IRR).
  • Two modifiable constructs for target audience assessment were also tested for reliability.

Main Results:

  • The final AQEL tool consists of 51 items, reduced to 25 items across 5 factors after analysis.
  • Reliability testing showed good internal consistency and split-half reliability for most constructs (Cronbach alpha >.80, Spearman-Brown >.80).
  • Test-retest reliability was stable over time for most factors.
  • Interrater reliability (ICC) was high, indicating strong agreement among evaluators (ICC(2,15) = .98 for 7 constructs).

Conclusions:

  • The App Quality Evaluation (AQEL) tool is a valid and reliable instrument for assessing nutrition app quality.
  • AQEL can be used by nutrition clinicians, educators, and researchers for clinical interventions.
  • Further validation of AQEL across diverse contexts is recommended.