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Validity of a questionnaire to assess fruit and vegetable intake in adults.
Eur J Clin Nutr. 2006 Mar; 60(3):408-15.EJ

Abstract

OBJECTIVE

To validate a method for assessing fruit and vegetable intake among adults in a population of low intake. The method assesses mean intake and ranks individuals by their usual intake.

DESIGN

A precoded fruit and vegetable Questionnaire included a 24-h recall and a food frequency. The participants filled in the Questionnaire, a week later they started a 7-day food record, 1-day weighed record and 6 days using household measures.

SUBJECTS

Following advertisements 40 participants were recruited, 36 returned food records(mean age=37 years).

RESULTS

No difference was observed between the average intake yielded by the 24-h recall and that from the 1-day weighed food record of fruits or vegetables. Correlation coefficients between results from the food frequency questionnaire and the 7-day food records were 0.45 (P=0.007) for vegetables, 0.63 (P<0.001) for fruits and 0.73 (P<0.001) for fruits and vegetables combined. Cross-classification into quartiles showed that the proportion of participants in the same or the adjacent quartile of the intake distribution were 94% for fruit intake and 80% for vegetable intake. Registered intake of fruits and vegetables was higher the first 4 days of the record than the last 3 days (P=0.002). The 4-day food record correlated with the food frequency questionnaire in similar manner as the 7-day record.

CONCLUSION

The present study indicates that the precoded 24-h recall may be valuable tool for measuring average intake of fruits and vegetables among adults in a population of low intake. Moreover, the food frequency questionnaire was valid for ranking individuals according to their usual intake. A 4-day food record might be sufficient when validating food frequency questionnaires for fruits and vegetables.

Authors+Show Affiliations

Unit for Nutrition Research, Landspitali-University Hospital & Department of Food Science, University of Iceland, Reykjavik, Iceland.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

16306927

Citation

Kristjansdottir, A G., et al. "Validity of a Questionnaire to Assess Fruit and Vegetable Intake in Adults." European Journal of Clinical Nutrition, vol. 60, no. 3, 2006, pp. 408-15.
Kristjansdottir AG, Andersen LF, Haraldsdottir J, et al. Validity of a questionnaire to assess fruit and vegetable intake in adults. Eur J Clin Nutr. 2006;60(3):408-15.
Kristjansdottir, A. G., Andersen, L. F., Haraldsdottir, J., de Almeida, M. D., & Thorsdottir, I. (2006). Validity of a questionnaire to assess fruit and vegetable intake in adults. European Journal of Clinical Nutrition, 60(3), 408-15.
Kristjansdottir AG, et al. Validity of a Questionnaire to Assess Fruit and Vegetable Intake in Adults. Eur J Clin Nutr. 2006;60(3):408-15. PubMed PMID: 16306927.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validity of a questionnaire to assess fruit and vegetable intake in adults. AU - Kristjansdottir,A G, AU - Andersen,L F, AU - Haraldsdottir,J, AU - de Almeida,M D V, AU - Thorsdottir,I, PY - 2005/11/25/pubmed PY - 2006/7/25/medline PY - 2005/11/25/entrez SP - 408 EP - 15 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 60 IS - 3 N2 - OBJECTIVE: To validate a method for assessing fruit and vegetable intake among adults in a population of low intake. The method assesses mean intake and ranks individuals by their usual intake. DESIGN: A precoded fruit and vegetable Questionnaire included a 24-h recall and a food frequency. The participants filled in the Questionnaire, a week later they started a 7-day food record, 1-day weighed record and 6 days using household measures. SUBJECTS: Following advertisements 40 participants were recruited, 36 returned food records(mean age=37 years). RESULTS: No difference was observed between the average intake yielded by the 24-h recall and that from the 1-day weighed food record of fruits or vegetables. Correlation coefficients between results from the food frequency questionnaire and the 7-day food records were 0.45 (P=0.007) for vegetables, 0.63 (P<0.001) for fruits and 0.73 (P<0.001) for fruits and vegetables combined. Cross-classification into quartiles showed that the proportion of participants in the same or the adjacent quartile of the intake distribution were 94% for fruit intake and 80% for vegetable intake. Registered intake of fruits and vegetables was higher the first 4 days of the record than the last 3 days (P=0.002). The 4-day food record correlated with the food frequency questionnaire in similar manner as the 7-day record. CONCLUSION: The present study indicates that the precoded 24-h recall may be valuable tool for measuring average intake of fruits and vegetables among adults in a population of low intake. Moreover, the food frequency questionnaire was valid for ranking individuals according to their usual intake. A 4-day food record might be sufficient when validating food frequency questionnaires for fruits and vegetables. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/16306927/Validity_of_a_questionnaire_to_assess_fruit_and_vegetable_intake_in_adults_ L2 - https://doi.org/10.1038/sj.ejcn.1602332 DB - PRIME DP - Unbound Medicine ER -