Measurement Characteristics of the Women’s Health Initiative Food Frequency Questionnaire

Patterson, Ruth E.; Kristal, Alan R.; Tinker, Lesley F.; Carter, Rachel A.; Bolton, Mary Pat; Agurs‐Collins, Tanya

doi:10.1016/s1047-2797(98)00055-6

Cited by 920 publications

(735 citation statements)

References 22 publications

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“…It is clear in comparing the two VRs (with and without region) that when the term for region was dropped from this model, virtually all of the variance was attributed to inter-person (subject) sources. Given the overall goal of this research, it is important to note that, within each region separately, we observed a somewhat larger overall standard deviation than typically observed in Western populations using standard FFQ methodology (Holmes et al, 1999;Patterson et al, 1999). In the combined raw data, the standard deviations tended to be intermediate; ie higher than in Kerala but lower than in Gujarat.…”

Section: Resultsmentioning

confidence: 62%

Sources of variability in dietary intake in two distinct regions of rural India: implications for nutrition study design and interpretation

et al. 2000

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Objective: Limited inter-person variability in nutrient intake hampers epidemiologic studies of diet ± disease relationships. Despite conjecture about non-traditional study bases providing large inter-person differences, virtually nothing is known about variations in nutrient intake outside of Europe and North America. The current study was conducted in India to determine sources of variability in the intakes of nutrients thought to be of public health importance. Design: Adult subjects in Gujarat (North India; n 60) and in Kerala (South India, n 60) were administered 24 h diet recall interviews six and eight times, respectively, over a 1 y period. To assess subject (inter-person) and residual (intra-person) contributions to variance, regression models were ®t to the data. From this, the variance ratio (VR, total within or intra-person: total between or inter-person) was computed. Setting: Rural communities in North and South India. Results: In both regions, inter-person variability was larger than that observed in the West. This was most pronounced in Gujarat, for which the VR was`1.0 for seven of the 12 energy-adjusted nutrient intakes in both men and women. In analyses of the combined data, region accounted for b 20% of variance for fat, iron, copper, zinc, b-carotene and ribo¯avin in both men and women. With the region term removed from this model, virtually all of the variability ascribed to region contributed to inter-person variability. Conclusions:The relatively large inter-person variability observed here could contribute to improved`resolution' of diet ± outcome relationships in epidemiologic studies. While this applies to data from each region, it was especially evident in analyses of the combined data.

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Section: Resultsmentioning

confidence: 62%

Sources of variability in dietary intake in two distinct regions of rural India: implications for nutrition study design and interpretation

et al. 2000

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“…Exposure information was collected as soon as possible after diagnosis. Estimates of nutrient intakes from an FFQ are not precise 18,59,60 and there is always the potential for measurement error; however, the FFQ used in our study has been extensively validated in comparison to more extensive methods of measuring dietary intake and biomarkers. 61,62 The 1-year referent period on which exposure data (including dietary intake) was based may not be appropriate to correctly determine associations if dietary intakes over several years is the relevant etiologic time frame.…”

Section: Discussionmentioning

confidence: 99%

Food groups and colon cancer risk in African‐Americans and Caucasians

Satia-Abouta

Galanko

Martin

et al. 2004

Intl Journal of Cancer

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The disparities in colon cancer incidence between AfricanAmericans and other U.S. ethnic groups are largely unexplained. This report examines associations of various food groups with colon cancer in African-Americans and Caucasians from a case-control study. Incident cases of histologically confirmed colon cancer, age 40 -80 years, (n ‫؍‬ 613) and matched controls (n ‫؍‬ 996) were interviewed in-person to ascertain potential colon cancer risk factors. Diet over the year before diagnosis or interview date was assessed using a validated food frequency questionnaire adapted to include regional foods. Multivariate logistic regression models estimated energy-adjusted and non-energy adjusted odds ratios (OR). Controls generally reported higher consumption (daily amount and weekly frequency) of fruits, vegetables and dark green, deep yellow fruits/vegetables, whereas cases consumed more refined carbohydrates and fats, oils and snacks. Regardless of ethnic group or energy adjustment, high and frequent vegetable consumption (particularly dark green vegetables) was protective, consistent with 20 -50% reductions in risk. In Caucasians, high refined carbohydrate and red meat consumption (amount and frequency) was associated with a statistically significant 2-fold increased risk in non-energy adjusted models. In African-Americans, frequent intake of dairy foods was associated with a doubling in risk (OR ‫؍‬ 1.9, 95% CI ‫؍‬ 1.1-3.4) in non-energy-adjusted models, whereas frequent fruit consumption correlated with a nonsignificant 30% lower risk. These findings add to growing evidence that plant foods may protect against colon cancer; however, the effects of the other food groups varied by ethnic group and energy adjustment. These results may also explain some of the ethnic differences in colon cancer incidence. © 2004 Wiley-Liss, Inc. Key words: African-Americans; colon cancer; diet; foods; food groups; ethnic group; CaucasiansCarcinoma of the colon is one of the most common cancers in developed countries. 1 In the United States (U.S.), colon cancer is the second leading cause of cancer death and the third most common cancer among adults, accounting for approximately 15% of all cancers diagnosed annually. 2,3 The American Cancer Society projects that in the year 2003, 147,500 new colon and rectal cancer cases will be diagnosed and an estimated 57,100 persons will die from these cancers. 4 Colon cancer incidence and mortality vary markedly by ethnic group; specifically, African-Americans have the highest incidence and mortality rates among all U.S. ethnic groups. 3,4 Between 1992-99, for example, colon and rectal cancer incidence and mortality rates were 61.9 and 29.1 per 100,000 respectively among African-Americans. In contrast, for Caucasians, these rates were 51.9 and 21.9 per 100,000, respectively. 3 The reasons for ethnic differences in incidence rates for colon cancer are largely unknown. Socioeconomic, behavioral, cultural and health care differences undoubtedly contribute to some of these disparities but do not complet...

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“…13 Dietary information was collected using food frequency questionnaires obtained at baseline and follow-up clinic visits. 14 The questionnaire at follow-up year 3 also included information regarding diet drink consumption over the previous 3 months. Diet drink intake was categorized into nine groups on the questionnaire, ranging from none or less than one per month to more than six drinks per day, with each drink defined as the equivalent of a 12-oz can of beverage.…”

Section: Methodsmentioning

confidence: 99%

Diet Drink Consumption and the Risk of Cardiovascular Events: A Report from the Women’s Health Initiative

et al. 2014

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BACKGROUND: Data are limited regarding the influence of diet drink consumption on cardiovascular disease (CVD) outcomes. OBJECTIVE: We aimed to evaluate the relationship between diet drink intake and cardiovascular events. DESIGN: We conducted a retrospective cohort study, utilizing data from the national, multicenter Women's Health Initiative Observational Study (WHI OS), recruiting subjects from 1993 to 1998. PATIENTS: Post-menopausal women with available diet drink intake data, without pre-existing CVD and who survived ≥ 60 days were included in the study. MAIN MEAURES: A composite of incident coronary heart disease, heart failure, myocardial infarction, coronary revascularization procedure, ischemic stroke, peripheral arterial disease and CVD death was used as the primary outcome. CVD death and all-cause mortality were secondary outcomes. Adjusted Cox proportional hazards models were used to compare primary and secondary outcomes across diet drink intake strata. KEY RESULTS: In all, 59,614 women, mean age 62.8 years, were included for analysis. In unadjusted analysis over a follow-up of 8.7±2.7 years, the primary outcome occurred in 8.5 % of the women consuming ≥ 2 diet drinks/day, compared to 6.9 %, 6.8 % and 7.2 % in the 5-7/week, 1-4/week and 0-3/month groups, respectively. After controlling for other CVD risk factors, women who consumed ≥ 2 drinks/day had a higher adjusted risk of CVD events (HR 1.3, 95 % CI 1.1-1.5), CVD mortality (HR 1.5, 95 % CI 1.03-2.3) and overall mortality (HR 1.3, 95 % CI 1.04-1.5) compared to the reference group (0-3 drinks/month). CONCLUSIONS: This analysis demonstrates an association between high diet drink intake and CVD outcomes and mortality in post-menopausal women in the WHI OS.

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Measurement Characteristics of the Women’s Health Initiative Food Frequency Questionnaire

Cited by 920 publications

References 22 publications

Sources of variability in dietary intake in two distinct regions of rural India: implications for nutrition study design and interpretation

Sources of variability in dietary intake in two distinct regions of rural India: implications for nutrition study design and interpretation

Food groups and colon cancer risk in African‐Americans and Caucasians

Diet Drink Consumption and the Risk of Cardiovascular Events: A Report from the Women’s Health Initiative

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