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The reliability of an adolescent dietary pattern identified using reduced-rank regression: comparison of a FFQ and 3 d food record


Appannah, G and Pot, GK and O'Sullivan, TA and Oddy, WH and Jebb, SA and Ambrosini, GL, The reliability of an adolescent dietary pattern identified using reduced-rank regression: comparison of a FFQ and 3 d food record, The British Journal of Nutrition, 112, (4) pp. 609-615. ISSN 0007-1145 (2014) [Refereed Article]

DOI: doi:10.1017/S0007114514001111


Despite the increasing use of dietary patterns (DP) to study diet and health outcomes, relatively few studies have examined the reliability of DP using different dietary assessment methods. Reduced-rank regression (RRR) is an emerging statistical method that incorporates a priori information to characterise DP related to specific outcomes of interest. The aim of the present study was to compare DP identified using the RRR method in a FFQ with those in a 3 d food record (FR). Participants were 783 adolescents from the Western Australian Pregnancy (Raine) Cohort Study who completed both a FFQ and FR at 14 years of age. A similar 'energy-dense, high-fat and low-fibre' DP was identified in the FFQ and FR that was characterised by high intakes of processed meat and sugar-sweetened beverages, and low intakes of vegetables and fresh fruit. Nutrient profiles for this DP were consistent in the FFQ and FR. Pearson's correlation coefficient between participants' z-scores for the DP identified in the FFQ and FR was 035 for girls and 049 for boys (P< 005). The mean difference between DP z-scores derived from the FFQ and FR was -008 (95 % CI -021, 004) for girls and -005 (95 % CI -017, 007) for boys. The 95 % limits of agreement were -255 to 239 for girls and -252 to 241 for boys. These findings suggest that very similar DP may be identified and their z-scores show modest agreement when applying the RRR method to dietary intake data collected from adolescents using a FFQ or FR.

Item Details

Item Type:Refereed Article
Keywords:Dietary patterns, Reliability, Adolescents, Raine Study
Research Division:Medical and Health Sciences
Research Group:Nutrition and Dietetics
Research Field:Clinical and Sports Nutrition
Objective Division:Health
Objective Group:Public Health (excl. Specific Population Health)
Objective Field:Nutrition
Author:Oddy, WH (Professor Wendy Oddy)
ID Code:107446
Year Published:2014
Web of Science® Times Cited:8
Deposited By:Menzies Institute for Medical Research
Deposited On:2016-03-16
Last Modified:2017-11-06

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