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Knowledge and food practices questionnaire: construction and validation.

Anelise Bozzetto da Silva1, Ângela B Piccoli1, Lucia C Pellanda2

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Summary
This summary is machine-generated.

A new Food Knowledge and Practices Questionnaire (QCPA) was developed and validated for children aged 7-11 years. This instrument effectively assesses nutritional knowledge and feeding practices based on the Brazilian Food Guide.

Keywords:
ChildrenFeeding practicesNutritional knowledgeValidation

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Area of Science:

  • Pediatric Nutrition
  • Health Education
  • Instrument Development

Background:

  • Assessing nutritional knowledge and feeding practices in children is crucial for public health.
  • Existing instruments may not align with current dietary guidelines, such as the latest Brazilian Food Guide.
  • A validated tool is needed to accurately measure these aspects in school-aged children.

Purpose of the Study:

  • To develop and validate an instrument to assess nutritional knowledge and feeding practices.
  • To ensure the instrument is suitable for children aged 7-11 years.
  • To base the instrument on the latest Brazilian Food Guide recommendations.

Main Methods:

  • Instrument creation followed by content validity assessment with nutritionists and a multidisciplinary group (using Content Validity Index [CVI]).
  • Face validity, reproducibility (Intraclass Correlation Coefficient [ICC], Kappa [k]), internal consistency (Cronbach's alpha [α]), and construct validity (Kaiser-Meyer-Olkin, Exploratory Factor Analysis) were evaluated.
  • A sample size calculation ensured adequate statistical power, with at least ten subjects per questionnaire item.

Main Results:

  • The final sample comprised 453 children (mean age 9.45 years).
  • Content validity (CVI) was high for relevance, clarity, and pertinence in the multidisciplinary group (≥91.8%).
  • Test-retest reliability showed good agreement (k=0.740 for Knowledge, ICC=0.754 for Food Practices); internal consistency (α) ranged from 0.589 to 0.618. Construct validity indicated a Kaiser-Meyer-Olkin of 0.724, with five factors identified for food practices.

Conclusions:

  • The developed Food Knowledge and Practices Questionnaire (Questionário de Conhecimento e Práticas Alimentares [QCPA]) is a valid and reliable instrument.
  • The QCPA can be effectively used to assess nutritional knowledge and food practices in children aged 7-11 years.
  • The instrument aligns with the latest Brazilian Food Guide, providing a valuable tool for researchers and health professionals.