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Identifying dietary patterns using a normal mixture model: application to the EPIC study

Fahey, Michael T.; Ferrari, Pietro; Slimani, Nadia; Vermunt, Jeroen K.; White, Ian R.; Hoffmann, Kurt; Wirfält, Elisabet LU ; Bamia, Christina; Touvier, Mathilde and Linseisen, Jakob, et al. (2012) In Journal of Epidemiology and Community Health 66(1). p.89-94
Abstract
Background Finite mixture models posit the existence of a latent categorical variable and can be used for probabilistic classification. The authors illustrate the use of mixture models for dietary pattern analysis. An advantage of this approach is taking classification uncertainty into account. Methods Participants were a random sample of women from the European Prospective Investigation into Cancer. Food consumption was measured using dietary questionnaires. Mixture models identified latent classes in food consumption data, which were interpreted as dietary patterns. Results Among various assumptions examined, models allowing the variance of foods to vary within and between classes fit better than alternatives assuming constant variance... (More)
Background Finite mixture models posit the existence of a latent categorical variable and can be used for probabilistic classification. The authors illustrate the use of mixture models for dietary pattern analysis. An advantage of this approach is taking classification uncertainty into account. Methods Participants were a random sample of women from the European Prospective Investigation into Cancer. Food consumption was measured using dietary questionnaires. Mixture models identified latent classes in food consumption data, which were interpreted as dietary patterns. Results Among various assumptions examined, models allowing the variance of foods to vary within and between classes fit better than alternatives assuming constant variance (the K-means method of cluster analysis also makes the latter assumption). An eight-class model was best fitting and five patterns validated well in a second random sample. Patterns with lower classification uncertainty tended to be better validated. One pattern showed low consumption of foods despite being associated with moderate body mass index. Conclusion Mixture modelling for dietary pattern analysis has advantages over both factor and cluster analysis. In contrast to these other methods, it is easy to estimate pattern prevalence, to describe patterns and to use patterns to predict disease taking classification uncertainty into account. Owing to substantial error in food consumptions, any analysis will usually find some patterns that cannot be well validated. While knowledge of classification uncertainty may aid pattern evaluation, any method will better identify patterns from food consumptions measured with less error. Mixture models may be useful to identify individuals who under-report food consumption. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
Journal of Epidemiology and Community Health
volume
66
issue
1
pages
89 - 94
publisher
BMJ Publishing Group
external identifiers
  • wos:000298080700015
  • scopus:84855990250
ISSN
1470-2738
DOI
10.1136/jech.2009.103408
language
English
LU publication?
yes
id
7a8dd726-4508-4cd9-a0e9-5be13402c857 (old id 2333784)
date added to LUP
2012-02-01 07:40:26
date last changed
2017-01-01 04:13:14
@article{7a8dd726-4508-4cd9-a0e9-5be13402c857,
  abstract     = {Background Finite mixture models posit the existence of a latent categorical variable and can be used for probabilistic classification. The authors illustrate the use of mixture models for dietary pattern analysis. An advantage of this approach is taking classification uncertainty into account. Methods Participants were a random sample of women from the European Prospective Investigation into Cancer. Food consumption was measured using dietary questionnaires. Mixture models identified latent classes in food consumption data, which were interpreted as dietary patterns. Results Among various assumptions examined, models allowing the variance of foods to vary within and between classes fit better than alternatives assuming constant variance (the K-means method of cluster analysis also makes the latter assumption). An eight-class model was best fitting and five patterns validated well in a second random sample. Patterns with lower classification uncertainty tended to be better validated. One pattern showed low consumption of foods despite being associated with moderate body mass index. Conclusion Mixture modelling for dietary pattern analysis has advantages over both factor and cluster analysis. In contrast to these other methods, it is easy to estimate pattern prevalence, to describe patterns and to use patterns to predict disease taking classification uncertainty into account. Owing to substantial error in food consumptions, any analysis will usually find some patterns that cannot be well validated. While knowledge of classification uncertainty may aid pattern evaluation, any method will better identify patterns from food consumptions measured with less error. Mixture models may be useful to identify individuals who under-report food consumption.},
  author       = {Fahey, Michael T. and Ferrari, Pietro and Slimani, Nadia and Vermunt, Jeroen K. and White, Ian R. and Hoffmann, Kurt and Wirfält, Elisabet and Bamia, Christina and Touvier, Mathilde and Linseisen, Jakob and Rodriguez-Barranco, Miguel and Tumino, Rosario and Lund, Eiliv and Overvad, Kim and de Mesquita, Bas Bueno and Bingham, Sheila and Riboli, Elio},
  issn         = {1470-2738},
  language     = {eng},
  number       = {1},
  pages        = {89--94},
  publisher    = {BMJ Publishing Group},
  series       = {Journal of Epidemiology and Community Health},
  title        = {Identifying dietary patterns using a normal mixture model: application to the EPIC study},
  url          = {http://dx.doi.org/10.1136/jech.2009.103408},
  volume       = {66},
  year         = {2012},
}