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Updated: Jul 6, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Are dietary patterns stable throughout early and mid-childhood? A birth cohort study
Kate Northstone1, Pauline M Emmett
1Department of Social Medicine, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK. Kate.Northstone@bristol.ac.uk
Insights
Childhood dietary patterns, identified using principal component analysis (PCA), show stability from ages 4 to 7. Regular dietary assessments are crucial for understanding long-term health impacts.
Area of Science:
- Nutritional Epidemiology
- Child Health Research
- Statistical Modeling in Nutrition
Background:
- Dietary patterns in childhood are crucial for long-term health outcomes.
- Understanding the stability of these patterns is essential for accurate health assessments.
- The Avon Longitudinal Study of Pregnancy and Childhood (ALSPAC) provides valuable longitudinal data.
Purpose of the Study:
- To assess the stability of dietary patterns identified through principal component analysis (PCA) from early to mid-childhood.
- To determine consistency of dietary patterns across multiple time-points in childhood.
- To inform the frequency of dietary assessments for accurate health outcome evaluation.
Main Methods:
- Utilized principal component analysis (PCA) to identify dietary patterns.
- Collected dietary frequency data from mothers via postal questionnaires at ages 3, 4, 7, and 9 years.
- Calculated component scores at each time-point for 6177 children with complete data.
Main Results:
- Three consistent dietary patterns ('processed', 'traditional', 'health conscious') were observed across childhood.
- Dietary patterns showed high correlations between time-points, with narrowest agreement between ages 4 and 7.
- Periods of dietary pattern change were noted between ages 3-4 and 7-9 years.
Conclusions:
- Dietary patterns exhibit reasonable stability in childhood, particularly between ages 4 and 7.
- Significant shifts in dietary patterns occur during specific developmental periods.
- Regular dietary monitoring is recommended to accurately assess diet-related health effects throughout childhood.
Abstract:
This study assesses the stability of dietary patterns obtained using principal components analysis (PCA) through early to mid-childhood. Dietary data were collected from children in the Avon Longitudinal Study of Pregnancy and Childhood (ALSPAC). Frequency of consumption of a range of food items was recorded by mothers using self-completion postal questionnaires when their children were 3, 4, 7 and 9 years of age. Dietary patterns were identified using PCA and component scores were calculated at each time-point. In total 6177 children had data available at all four time-points. Three patterns were consistently seen across time: the 'processed', 'traditional' and 'health conscious' patterns. At 3 years an additional 'snack' pattern was obtained and at 9 years the 'health conscious' pattern was slightly modified (meat products were negatively associated). High correlations were evident for all three scores between each pair of time-points. The widest limits of agreement were seen for all pairings between the 3 and 9 years data, whilst the narrowest were seen between the 4 and 7 years data. A reasonable level of agreement was seen with the categorised component scores from each time-point of data (kappa ranging from 0.28 to 0.47). Virtually identical dietary patterns were obtained at the ages of 4 and 7; however, periods of change were apparent between the ages of 3 and 4 and the ages of 7 and 9. It is important to make regular dietary assessments during childhood in order to assess accurately the effects of diet on future health outcomes.
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