Reproducibility and relative validity of an extensive semi-quantitative food frequency questionnaire using dietary records and biochemical markers among Greek schoolteachers

Katsouyanni, Klea; Rimm, Eric B.; Gnardellis, Charalambos; Trichopoulos, Dimitrios; Polychronopoulos, Evangelos; Trichopoulou, Antonia

doi:10.1093/ije/26.suppl_1.s118

Cited by 290 publications

(195 citation statements)

References 16 publications

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“…The consistency of the 7DD, HLQ and FFQ in the present analysis of alcohol and risk of CHD is aligned with the results of previous validation studies, in which good agreement was found among self-reported instruments (26)(27)(28)(29)(30)(31) . Some of the correlation between self-reported instruments may be attributable to within-person error (32) .…”

Section: Discussionsupporting

confidence: 88%

CHD risk in relation to alcohol intake from categorical and open-ended dietary instruments

Ward

Luben

Wareham

et al. 2010

Public Health Nutr.

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Objective: To examine the risk of CHD in relation to alcohol intake from three different instruments. Design: In the European Prospective Investigation into Cancer in Norfolk study, weekly alcohol intake was estimated from a single question in a mail-in health and lifestyle questionnaire (HLQ), a semi-quantitative FFQ, and a 7 d diet diary (7DD). Information on smoking status, physical activity, disease history, social class and medication use was reported in the HLQ. Height, weight, blood pressure and blood lipids were measured at a health check-up. The average length of follow-up was 11 years. The association between alcohol intake and incident fatal and non-fatal CHD in a nested case-control sample was calculated using logistic regression. Setting: Norfolk, England. Subjects: A total of 2151 cases of incident fatal and non-fatal CHD and 5354 controls. Results: The Spearman correlation values between the 7DD, FFQ and HLQ alcohol estimates ranged from r 5 0?70 to 0?82 (P , 0?0001 for all r values). Alcohol intake from all instruments was inversely associated with the risk of CHD in age-and multivariate-adjusted models. The relationships between the risk of CHD and alcohol intake from the 7DD, HLQ or FFQ were not significantly different from each other (P . 0?10). A marginal difference between men and women was detected for the risk of CHD in relation to HLQ alcohol intake (P 5 0?065). Conclusions: In conclusion, while the instruments were not uniform in their assessment of alcohol intake levels, the 7DD, HLQ and FFQ yielded similar inverse associations between alcohol intake and risk of CHD.

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Section: Discussionsupporting

confidence: 88%

CHD risk in relation to alcohol intake from categorical and open-ended dietary instruments

Ward

Luben

Wareham

et al. 2010

Public Health Nutr.

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“…vitamins A, C and E) (28) . Despite potential seasonal changes in food intake, our FFQ showed comparable reliability for energy and nutrient intakes to previous FFQ that were designed to investigate intake over a year (29)(30)(31)(32) .…”

Section: Test-retest Reliabilitymentioning

confidence: 93%

A comprehensive FFQ developed for use in New Zealand adults: reliability and validity for nutrient intakes

Sam

Skeaff

Skidmore

2012

Public Health Nutr.

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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 b-carotene (0?58), and the lowest for Zn (0?24) and Ca (0?28). For all energyadjusted 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 b-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.

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“…Usual dietary intake over the past year was assessed by a validated, semiquantitative, interviewer-administered food frequency questionnaire (FFQ) (Gnardellis et al, 1995;Katsouyianni et al, 1997), including approximately 150 food items and beverages, as well as questions on habitual cooking methods, type of lipids used in cooking, etc. Standard portion sizes were used for the estimation of consumed quantities (Trichopoulou, 1992;Gnardellis et al, 1995), and nutrient intakes were calculated using a food composition database modified to accommodate the particularities of the Greek diet (Trichopoulou, 1992).…”

Section: Methodsmentioning

confidence: 99%

“…Standard portion sizes were used for the estimation of consumed quantities (Trichopoulou, 1992;Gnardellis et al, 1995), and nutrient intakes were calculated using a food composition database modified to accommodate the particularities of the Greek diet (Trichopoulou, 1992). Intakes were expressed as grams per day, accounting for seasonal variation (Katsouyianni et al, 1997). PC and cluster analyses were based on food items aggregated into 17 food groups, as shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Tracing the Mediterranean diet through principal components and cluster analyses in the Greek population

et al. 2003

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Objective: To identify dietary patterns, and their socio-demographic and lifestyle correlates in a large sample of Greek adults, and assess their adherence to the traditional Mediterranean diet. Design: Principal component (PC) analysis was used to identify dietary patterns among 28 034 participants of the Greek branch of the European Prospective Investigation into Cancer and Nutrition. Dietary information was collected through a validated, semiquantitative, food-frequency questionnaire. The extracted PCs were subsequently regressed on sociodemographic and lifestyle variables. Analyses were also performed to classify individuals with similar dietary behavior into clusters. Results: Four PCs were identified: PC1 resembled the Mediterranean diet, PC2 approximated a vegetarian diet with emphasis on seed oils, PC3 reflected a preference for sweets, and PC4 reflected a Western diet. PC1 and PC2 were positively associated with age, education, physical activity, and nonsmoking status. Females, in comparison to males, scored higher on PC1 but lower on PC2. Males, younger, more educated individuals, nonsmokers and residents of Greater Athens (Attica) scored higher on PC3. PC4 was associated with younger age, less education, and current smoking. In cluster analyses, cluster A contrasted clusters B and C in having much higher mean PC1-and PC2-scores and substantially lower PC3-and PC4-scores. PC1 and PC4 were, respectively, positively and inversely correlated with an a priori Mediterranean-diet score; PC2 and PC3 were unrelated to it. Conclusion: The Mediterranean-like PC1-score as well as the vegetarian-like PC2 were higher among older, more educated people, and were associated with a healthier lifestyle than PC4, which reflected a Western-type diet. PC1 was strongly positively associated with an a priori Mediterranean-diet score.

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Reproducibility and relative validity of an extensive semi-quantitative food frequency questionnaire using dietary records and biochemical markers among Greek schoolteachers

Abstract: These data indicate that the semi-quantitative FFQ is reproducible and provides a reasonably reliable measure of intake. Significant correlations between diet and an independent biochemical marker further corroborate the relative validity of our questionnaire in this Greek population.

Cited by 290 publications

References 16 publications

CHD risk in relation to alcohol intake from categorical and open-ended dietary instruments

CHD risk in relation to alcohol intake from categorical and open-ended dietary instruments

A comprehensive FFQ developed for use in New Zealand adults: reliability and validity for nutrient intakes

Tracing the Mediterranean diet through principal components and cluster analyses in the Greek population

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