Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley

Polyphenol is a non-nutrient phytochemical compound existed abundantly in plant-based diet which has the properties to prevent age related oxidative damage induced diseases. However, there are diffi culties in quantifying its intake and local food frequency questionnaire (FFQ) for the assessment i...

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Main Authors:	Suzana Shahar, Chiah, Hui Lin, Hasnah Haron
Format:	Article
Language:	English
Published:	Penerbit UKM 2014
Subjects:	RA Public aspects of medicine
Online Access:	http://journalarticle.ukm.my/8537/ http://journalarticle.ukm.my/8537/ http://journalarticle.ukm.my/8537/1/Development_and_Validation_of_Food_Frequency_Questionnaire.pdf

id	ukm-8537
recordtype	eprints
spelling	ukm-85372016-12-14T06:47:29Z http://journalarticle.ukm.my/8537/ Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley Suzana Shahar, Chiah, Hui Lin Hasnah Haron, RA Public aspects of medicine Polyphenol is a non-nutrient phytochemical compound existed abundantly in plant-based diet which has the properties to prevent age related oxidative damage induced diseases. However, there are diffi culties in quantifying its intake and local food frequency questionnaire (FFQ) for the assessment is not available. Therefore, this study aimed to develop and validate FFQ for estimation of dietary polyphenol intake among 93 individuals aged 60 years and above recruited from several senior citizen clubs in Klang Valley. Phase I of the study involved the development of FFQ consisted of 117 items under 9 categories and formation of the database extracted from PHENOL-EXPLORER. In Phase II, the intake of polyphenol estimated using FFQ was compared with reference method consisted of 2-day diet records and diet history questionnaire (DHQ). The mean dietary polyphenol intake estimated from FFQ and the reference method was 2770.7 ± 1552.4 mg/d and 2171.4 ± 898.8 mg/d, respectively. Spearman’s rho and Kendall’s tau-b analysis indicated that there was a signifi cant positive correlation between polyphenol intake estimated from FFQ and reference method (r = 0.41, p < 0.001; r = 0.28, p < 0.001). For Bland-Altman plot, 95.7% of scattered plot fell within ± 1.96 SD limits of agreement revealed that there was good agreement between the two methods used. Cross-classifi cation analysis showed that 36.6% was categorized in the same quartile, 78.5% in identical and contiguous quartiles, with only 3.2% in the opposite quartiles. Regression analysis showed that all categories in FFQ signifi cantly account for the inter-variance for dietary polyphenol intake after controlling for the other variables (R2 = 1.000, p < 0.001). In conclusion, the newly developed FFQ is considered valid and has the potential to be used as a tool to estimate polyphenol intake among elderly individuals in Malaysia. Penerbit UKM 2014 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/8537/1/Development_and_Validation_of_Food_Frequency_Questionnaire.pdf Suzana Shahar, and Chiah, Hui Lin and Hasnah Haron, (2014) Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley. Jurnal Sains Kesihatan Malaysia, 12 (2). pp. 33-40. ISSN 1675-8161 http://ejournal.ukm.my/jskm/issue/view/572
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
topic	RA Public aspects of medicine
spellingShingle	RA Public aspects of medicine Suzana Shahar, Chiah, Hui Lin Hasnah Haron, Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley
description	Polyphenol is a non-nutrient phytochemical compound existed abundantly in plant-based diet which has the properties to prevent age related oxidative damage induced diseases. However, there are diffi culties in quantifying its intake and local food frequency questionnaire (FFQ) for the assessment is not available. Therefore, this study aimed to develop and validate FFQ for estimation of dietary polyphenol intake among 93 individuals aged 60 years and above recruited from several senior citizen clubs in Klang Valley. Phase I of the study involved the development of FFQ consisted of 117 items under 9 categories and formation of the database extracted from PHENOL-EXPLORER. In Phase II, the intake of polyphenol estimated using FFQ was compared with reference method consisted of 2-day diet records and diet history questionnaire (DHQ). The mean dietary polyphenol intake estimated from FFQ and the reference method was 2770.7 ± 1552.4 mg/d and 2171.4 ± 898.8 mg/d, respectively. Spearman’s rho and Kendall’s tau-b analysis indicated that there was a signifi cant positive correlation between polyphenol intake estimated from FFQ and reference method (r = 0.41, p < 0.001; r = 0.28, p < 0.001). For Bland-Altman plot, 95.7% of scattered plot fell within ± 1.96 SD limits of agreement revealed that there was good agreement between the two methods used. Cross-classifi cation analysis showed that 36.6% was categorized in the same quartile, 78.5% in identical and contiguous quartiles, with only 3.2% in the opposite quartiles. Regression analysis showed that all categories in FFQ signifi cantly account for the inter-variance for dietary polyphenol intake after controlling for the other variables (R2 = 1.000, p < 0.001). In conclusion, the newly developed FFQ is considered valid and has the potential to be used as a tool to estimate polyphenol intake among elderly individuals in Malaysia.
format	Article
author	Suzana Shahar, Chiah, Hui Lin Hasnah Haron,
author_facet	Suzana Shahar, Chiah, Hui Lin Hasnah Haron,
author_sort	Suzana Shahar,
title	Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley
title_short	Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley
title_full	Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley
title_fullStr	Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley
title_full_unstemmed	Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley
title_sort	development and validation of food frequency questionnaire (ffq) for estimation of the dietary polyphenol intake among elderly individuals in klang valley
publisher	Penerbit UKM
publishDate	2014
url	http://journalarticle.ukm.my/8537/ http://journalarticle.ukm.my/8537/ http://journalarticle.ukm.my/8537/1/Development_and_Validation_of_Food_Frequency_Questionnaire.pdf
first_indexed	2023-09-18T19:52:35Z
last_indexed	2023-09-18T19:52:35Z
_version_	1777406318153302016

Development and Validation of Food Frequency Questionnaire (FFQ) for Estimation of the Dietary Polyphenol Intake Among Elderly Individuals in Klang Valley

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