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Validity and Reliability of an Expanded Vegetable Questionnaire Among Elementary School Children.
M J Landry1, N Ranjit2, D M Hoelscher2
1The University of Texas at Austin, Department of Nutritional Sciences, Austin, TX.
Current Developments in Nutrition
|August 16, 2019
Summary
The revised School Physical Activity and Nutrition questionnaire accurately measures children's vegetable intake. This validated tool enhances nutrition research for students in grades 3-5.
Area of Science:
- Nutrition Science
- Pediatric Health
- Dietary Assessment
Background:
- Childhood nutrition is crucial for development.
- Accurate dietary assessment tools are needed for school-aged children.
- Existing questionnaires require expansion to capture diverse vegetable consumption.
Purpose of the Study:
- To enhance the School Physical Activity and Nutrition questionnaire with more vegetable options.
- To evaluate the validity and reliability of the revised questionnaire items.
- To ensure accurate measurement of student vegetable intake.
Main Methods:
- Utilized two convenience samples of third to fifth graders (n=70 for validity, n=76 for reliability).
- Assessed validity by comparing questionnaire responses with 24-hour dietary recalls.
- Evaluated reliability using same-day test-retest methodology.
Main Results:
- Agreement correlations for validity ranged from 0.35 to 0.71.
- Reliability testing showed strong results: Spearman coefficients >0.50 for 6 items, weighted Kappa >0.40 for all 7 items.
- Percentage agreements exceeded 75% for 5 items, indicating good reproducibility.
Conclusions:
- The enhanced School Physical Activity and Nutrition questionnaire is a valid and reliable tool.
- It accurately measures the previous day's vegetable intake in third- to fifth-grade students.
- This study provides a robust instrument for childhood nutrition research.
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