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Validity and reliability of the Block98 food-frequency questionnaire in a sample of Canadian women.
Public Health Nutr. 2006 Feb; 9(1):84-93.PH

Abstract

OBJECTIVE

To assess the validity and reliability of the most recent adaptation of Block's full-diet food-frequency questionnaire (FFQ) among a sample of Canadian women.

DESIGN

Participants completed a self-administered FFQ (FFQ1), two unannounced 24-hour recalls (weekday and weekend) and a second FFQ (FFQ2) between October 2003 and February 2004. FFQs and recalls were analysed for 32 nutrients using Block Dietary Data Systems and the University of Minnesota's Nutrient Data System. Mean and median intakes were computed, along with crude and deattenuated Pearson correlation coefficients between FFQ1 and the average of two recalls (validity) and between FFQ1 and FFQ2 (reliability).

SETTING

Ontario, Canada.

SUBJECTS

A random population-based sample (n = 166) of women aged 25 to 74 years.

RESULTS

One hundred and fifteen (69%) women completed FFQ1, 96 completed FFQ1 and both recalls, and 93 completed both FFQs, about 56 days apart. Mean intakes were similar for most nutrients. FFQ reliability was high, with Pearson correlation coefficients having a median of 0.75, ranging from 0.57 to 0.90 (macronutrients) and from 0.65 to 0.88 (micronutrients from supplements and food). FFQ validity was moderate to high, with deattenuated Pearson correlation coefficients having a median of 0.59, ranging from 0.11 to 0.73 (macronutrients) and from 0.50 to 0.76 (micronutrients from supplements and food). Our micronutrient correlations were similar to or higher than those of other studies that included supplements. Two correlations <0.40 were associated with fats.

CONCLUSIONS

The validity and reliability of this full-diet version of the Block FFQ were moderate to high, supporting its use in future studies among Canadian women.

Authors+Show Affiliations

Division of Preventive Onoclogy, Cancer Care Ontario, Toronto, Ontario, Canada. beatrice.boucher@cancercare.on.ca.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

16480538

Citation

Boucher, Beatrice, et al. "Validity and Reliability of the Block98 Food-frequency Questionnaire in a Sample of Canadian Women." Public Health Nutrition, vol. 9, no. 1, 2006, pp. 84-93.
Boucher B, Cotterchio M, Kreiger N, et al. Validity and reliability of the Block98 food-frequency questionnaire in a sample of Canadian women. Public Health Nutr. 2006;9(1):84-93.
Boucher, B., Cotterchio, M., Kreiger, N., Nadalin, V., Block, T., & Block, G. (2006). Validity and reliability of the Block98 food-frequency questionnaire in a sample of Canadian women. Public Health Nutrition, 9(1), 84-93.
Boucher B, et al. Validity and Reliability of the Block98 Food-frequency Questionnaire in a Sample of Canadian Women. Public Health Nutr. 2006;9(1):84-93. PubMed PMID: 16480538.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validity and reliability of the Block98 food-frequency questionnaire in a sample of Canadian women. AU - Boucher,Beatrice, AU - Cotterchio,Michelle, AU - Kreiger,Nancy, AU - Nadalin,Victoria, AU - Block,Torin, AU - Block,Gladys, PY - 2006/2/17/pubmed PY - 2006/7/25/medline PY - 2006/2/17/entrez SP - 84 EP - 93 JF - Public health nutrition JO - Public Health Nutr VL - 9 IS - 1 N2 - OBJECTIVE: To assess the validity and reliability of the most recent adaptation of Block's full-diet food-frequency questionnaire (FFQ) among a sample of Canadian women. DESIGN: Participants completed a self-administered FFQ (FFQ1), two unannounced 24-hour recalls (weekday and weekend) and a second FFQ (FFQ2) between October 2003 and February 2004. FFQs and recalls were analysed for 32 nutrients using Block Dietary Data Systems and the University of Minnesota's Nutrient Data System. Mean and median intakes were computed, along with crude and deattenuated Pearson correlation coefficients between FFQ1 and the average of two recalls (validity) and between FFQ1 and FFQ2 (reliability). SETTING: Ontario, Canada. SUBJECTS: A random population-based sample (n = 166) of women aged 25 to 74 years. RESULTS: One hundred and fifteen (69%) women completed FFQ1, 96 completed FFQ1 and both recalls, and 93 completed both FFQs, about 56 days apart. Mean intakes were similar for most nutrients. FFQ reliability was high, with Pearson correlation coefficients having a median of 0.75, ranging from 0.57 to 0.90 (macronutrients) and from 0.65 to 0.88 (micronutrients from supplements and food). FFQ validity was moderate to high, with deattenuated Pearson correlation coefficients having a median of 0.59, ranging from 0.11 to 0.73 (macronutrients) and from 0.50 to 0.76 (micronutrients from supplements and food). Our micronutrient correlations were similar to or higher than those of other studies that included supplements. Two correlations <0.40 were associated with fats. CONCLUSIONS: The validity and reliability of this full-diet version of the Block FFQ were moderate to high, supporting its use in future studies among Canadian women. SN - 1368-9800 UR - https://www.unboundmedicine.com/medline/citation/16480538/Validity_and_reliability_of_the_Block98_food_frequency_questionnaire_in_a_sample_of_Canadian_women_ L2 - https://www.cambridge.org/core/product/identifier/S1368980006000139/type/journal_article DB - PRIME DP - Unbound Medicine ER -