Background
There are limited validated FFQs for infants and toddlers, most of which were evaluated in Europe or Oceania and the available ones for use in the US have important limitations.
Objective
To assess the validity of a food frequency questionnaire (FFQ) developed for infants and toddlers.
Design
A semi-quantitative FFQ was developed including 52 food items, their source and portion sizes. It enquired about diets over the previous 7 days. Its validity was assessed in a cross-sectional study. Participants completed the FFQ followed by a 24-hour recall on two occasions with one week between data collection.
Participants/setting
A total of 296 caregivers of infants and toddlers aged 0–24 months enrolled in WIC-Puerto Rico.
Main outcome measures
Intake of nutrients and food groups were averaged for the two FFQs and the two 24-h food recalls and adjusted for energy intake.
Statistical analyses performed
Spearman correlations were performed for intakes of energy, nutrients, and foods between administrations and between instruments. Correlation coefficients were de-attenuated to account for variation in the 24 hour recalls.
Results
A total of 241 participants completed the study. Intake of all nutrients and foods were significantly correlated between FFQs, 24-h recalls and between the average of FFQs and 24-h food recalls. The de-attenuated correlation for nutrients between the FFQs and 24-h recalls ranged from 0.26 (folate) to 0.77 (energy), with an average correlation of 0.53. The de-attenuated correlation for food groups between the FFQs and 24-h recalls ranged from 0.28 (sweets) to 0.80 (breast-milk) with an average correlation of 0.55. When analyses were restricted to those consuming foods other than breast milk or formula (N=186), results were similar.
Conclusions
This semi-quantitative FFQ is a tool that offers reasonably valid rankings for intake of energy, nutrients, foods and food groups in this sample of infants and toddlers.