Document Detail


Methodological challenges when monitoring the diet of pregnant women in a large study: experiences from the Norwegian Mother and Child Cohort Study (MoBa).
MedLine Citation:
PMID:  18171404     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this article is to describe the main methodological challenges in the monitoring of dietary intake in the Norwegian Mother and Child Cohort Study (MoBa), a pregnancy cohort aiming to include 100 000 participants. The overall challenge was to record dietary patterns in sufficient detail to support future testing of a broad range of hypotheses, while at the same time limiting the burden on the participants. The main questions to be answered were: which dietary method to choose, when in pregnancy to ask, which time period should the questions cover, which diet questions to include, how to perform a validation study, and how to handle uncertainties in the reporting. Our decisions were as follows: using a semi-quantitative food frequency questionnaire (FFQ) (in use from 1 March 2002), letting the participants answer in mid-pregnancy, and asking the mother what she has eaten since she became pregnant. The questions make it possible to estimate intake of food supplements, antioxidants and environmental contaminants in the future. Misreporting is handled by consistency checks. Reports with a calculated daily energy intake of <4.5 and >20 MJ day(-1) are excluded, about 1% in each end of the scale. A validation study confirmed that the included intakes are realistic. The outcome of our methodological choices indicates that our FFQ strikes a reasonable balance between conflicting methodological and scientific interests, and that our approach therefore may be of use to others planning to monitor diet in pregnancy cohorts.
Authors:
Helle Margrete Meltzer; Anne Lise Brantsaeter; Trond A Ydersbond; Jan Alexander; Margaretha Haugen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Maternal & child nutrition     Volume:  4     ISSN:  1740-8695     ISO Abbreviation:  Matern Child Nutr     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2008-01-03     Completed Date:  2008-03-24     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101201025     Medline TA:  Matern Child Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  14-27     Citation Subset:  IM    
Affiliation:
Division of Environmental Medicine, Department of Food Safety and Nutrition, Norwegian Institute of Public Health, Nydalen, Oslo, Norway.
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MeSH Terms
Descriptor/Qualifier:
Adult
Cohort Studies
Diet* / psychology,  statistics & numerical data,  trends
Diet Surveys*
Dietary Supplements / statistics & numerical data
Female
Humans
Maternal Nutritional Physiological Phenomena / physiology*
Norway
Nutrition Assessment*
Pregnancy
Pregnancy Trimester, Second
Prenatal Nutritional Physiological Phenomena
Prospective Studies
Questionnaires / standards
Self Disclosure

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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