Document Detail

A comprehensive FFQ developed for use in New Zealand adults: reliability and validity for nutrient intakes.
MedLine Citation:
PMID:  23199788     Owner:  NLM     Status:  Publisher    
OBJECTIVE: To evaluate the reliability and relative validity of a semi-quantitative FFQ for assessing the habitual intake of multiple nutrients in New Zealand (NZ) adults over the past 12 months. DESIGN: A 154-item FFQ was developed. After initial pre-testing, reliability was assessed using intra-class correlations. Relative validity was assessed by comparing nutrient intakes derived from the FFQ v. those from an 8 d diet record (8dWDR) collected over 12 months and selected blood biomarkers, using Spearman correlations. Supplementary cross-classification and Bland-Altman analyses were performed to assess validity of the FFQ v. the 8dWDR. SETTING: Dunedin, NZ. SUBJECTS: One hundred and thirty-two males and females aged 30-59 years who completed all FFQ and 8dWDR and provided a blood sample. RESULTS: Reliability coefficients ranged from 0·47 for Ca to 0·83 for alcohol, with most values falling between 0·60 and 0·80. The highest validity coefficients for energy-adjusted data were observed for alcohol (0·74), cholesterol (0·65) and β-carotene (0·58), and the lowest for Zn (0·24) and Ca (0·28). For all energy-adjusted nutrients mean percentage correct classification was 77·9 % and gross misclassification was 4·5 %. Results of Bland-Altman analyses showed wide limits of agreement for all micronutrients but high agreement was observed for most macronutrients (99 % for protein, 103 % for total fat). When compared with biomarkers, energy-adjusted coefficients were 0·34 for β-carotene and 0·33 for vitamin C. CONCLUSIONS: The FFQ provides highly repeatable measurements and good validity in ranking individuals' intake, suggesting that it will be a useful tool to assess nutrient intake of NZ adults in future research.
Cecilia Hy Sam; Sheila Skeaff; Paula Ml Skidmore
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-3
Journal Detail:
Title:  Public health nutrition     Volume:  -     ISSN:  1475-2727     ISO Abbreviation:  Public Health Nutr     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9808463     Medline TA:  Public Health Nutr     Country:  -    
Other Details:
Languages:  ENG     Pagination:  1-10     Citation Subset:  -    
Department of Human Nutrition, University of Otago, PO Box 56, Dunedin, New Zealand.
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